Ableton Live MCP Server
Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@Ableton Live MCP Serverset the tempo to 128 BPM and start playback"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
Ableton Live MCP Server (ableton-mcp-server)
A Node.js/TypeScript stdio Model Context Protocol (MCP) server for controlling and querying Ableton Live via a Python Remote Script TCP bridge.
Architecture
+-------------------+ stdio (MCP) +--------------------+ TCP (JSON) +--------------------+
| MCP Client | <-------------------> | ableton-mcp-server | <------------------> | Ableton Live |
| (Claude, AGY, etc)| | (Node.js/TS) | localhost:9877 | (Remote Script) |
+-------------------+ +--------------------+ +--------------------+MCP Transport: Communicates over
stdiousing@modelcontextprotocol/sdk. Diagnostics and operational logs are strictly directed tostderrto preserve stdout for JSON-RPC frames.Ableton Bridge: Keeps Ableton Live access behind a typed
AbletonClientadapter communicating over localhost TCP port9877using framed JSON requests.Remote Script: A Python Control Surface script running inside Ableton Live's Python environment that handles commands and thread-safe main-thread scheduling.
Capability Discovery: Queries the running Remote Script's handshake (
get_script_info) dynamically at startup to verify supported capabilities and script version.
Related MCP server: ableton-mcp
Setup Instructions
1. Install the Ableton Remote Script
Copy the remote-script/ directory into your Ableton Live User Library's Remote Scripts folder:
macOS:
mkdir -p ~/Music/Ableton/User\ Library/Remote\ Scripts/AbletonMCP
cp remote-script/__init__.py ~/Music/Ableton/User\ Library/Remote\ Scripts/AbletonMCP/__init__.pyWindows:
xcopy remote-script\__init__.py "%USERPROFILE%\Documents\Ableton\User Library\Remote Scripts\AbletonMCP\" /Y2. Enable in Ableton Live
Open Ableton Live.
Open Preferences (
Cmd + ,orCtrl + ,).Select the Link / Tempo / MIDI tab.
Under Control Surface, select AbletonMCP from the dropdown menu.
Set Input and Output to
None.Live will display a status message:
AbletonMCP: Listening for commands on port 9877.
3. Build & Run the MCP Server
# Install dependencies
npm install
# Build TypeScript output
npm run build
# Start the stdio MCP server
npm start4. Configure in MCP Client
Add the server to your MCP client configuration (e.g. claude_desktop_config.json):
{
"mcpServers": {
"ableton": {
"command": "node",
"args": [
"/path/to/ableton-mcp-server/dist/index.js"
],
"env": {
"ABLETON_HOST": "127.0.0.1",
"ABLETON_PORT": "9877"
}
}
}
}Capabilities & Compatibility
Supported Live Versions & Python Surface
Python Compatibility: Supports Python 2 (Live 10) and Python 3 (Live 11/12).
Group Track Safety: Safely inspects group tracks (
is_foldable), folded tracks (is_grouped), return tracks, and master tracks without throwingAttributeErroron arm state.Arrangement & Session Clips: Exposes both Session View clip slots and Arrangement View clips where available.
Available MCP Tools
Health & Discovery
get_health: Ping Ableton Live Remote Script TCP bridge, report script version, and capability list.
Read Tools
get_session_info: Global session metadata (tempo, time signature, track count, master volume/pan).get_track_structure: Summary of all tracks including group parent/child relationships and mixer state.get_track_detail: Detailed track breakdown (clip slots, arrangement clips, devices).get_clip_notes: Read all MIDI notes from a clip slot.get_device_parameters: Get parameter list for a device on a track.get_browser_tree: Explore top-level categories in Live browser.get_browser_items: Retrieve browser items at a category path.get_bulk_session_structure: Retrieve session info, scenes, and all tracks with clip summaries in one single round trip.
Mutation / Write Tools
set_tempo: Modify BPM.set_track_name: Rename a track.set_track_mute/set_track_solo/set_track_arm: Control track mixer states.create_midi_track: Insert a new MIDI track.create_clip: Create a new clip slot clip with specified length and name.set_clip_name: Rename a clip.edit_clip_notes: Add or replace MIDI notes in a clip slot (mode: "add" | "replace"). Replacing explicitly clears existing notes before inserting the complete new sequence.delete_clip: Remove a clip slot clip.fire_clip/stop_clip: Transport controls for individual clip slots.fire_scene/stop_all_clips: Session view scene launching.start_playback/stop_playback: Global playback transport controls.set_device_parameter: Update device parameter values.load_browser_item: Load instrument/effect by URI onto a track.bulk_edit_clips: Batch clip creation and renaming in serial order on Live's main thread.bulk_set_device_parameters: Batch update multiple device parameters in a single round trip.
Troubleshooting
Connection Refused (
127.0.0.1:9877):Ensure Ableton Live is open and
AbletonMCPis selected as an active Control Surface in Live Preferences.Check if port 9877 is blocked by firewall or in use by another application.
Unsupported Capability Errors:
The MCP server queries
get_script_infoon startup. If a tool requires a Remote Script command that is missing, it returns a clear unsupported-capability error. Ensureremote-script/__init__.pyis updated in your User Library.
Group Track Errors:
Group tracks and Master/Return tracks do not have arm buttons. The
AbletonMCPscript handles arm state safely viacan_be_armedchecks.
How to Add a New Live-Side Command
To add a new capability to the server:
Add Python Handler in
remote-script/__init__.py:def _my_new_feature(self, param1): # Perform Live API call return {"result": ...}Route Command in
_process_command:If reading state, dispatch directly.
If mutating state, schedule on the main thread via
main_thread_task.
Register Capability in
_get_script_info: Add"my_new_feature"string to thecapabilitieslist in_get_script_info().Define Types & Schema:
Add TypeScript type definitions in
src/types/ableton.ts.Add tool definition in
src/tools/definitions.tsspecifyingrequiredCapability: 'my_new_feature'.
Implement Handler:
Add a case branch in
src/tools/handlers.tscallingthis.client.sendCommand('my_new_feature', { ... }).
Rebuild:
npm run build
License
MIT License. See LICENSE for details.
Available Tools
33 toolsbulk_edit_clipsB
Batch edit multiple clip names and/or batch create clips in a single round trip.
| Name | Required | Description | Default |
|---|---|---|---|
| names | No | Items to rename | |
| create | No | Items to create |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full behavioral burden. It discloses no mutation semantics beyond the verb: nothing about partial failure handling, atomicity of a batch, index shifting when clips are created, error behavior, or what the call returns. For a bulk mutation tool with zero annotation coverage this is a substantial gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single compact sentence that front-loads both capabilities ('edit' and 'create'). No wasted words, though the terseness is also what leaves behavioral gaps unaddressed.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a bulk mutation tool with no annotations and no output schema, the description should explain what happens on partial failures, whether creates shift existing clip indices, and how errors are surfaced. None of that is present, leaving the agent under-informed about a genuinely complex operation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100% (both 'names' and 'create' arrays are described in-schema with their item fields), so the schema does the heavy lifting. The description adds nothing about field syntax or index semantics beyond what the schema already states, which is the baseline-3 case.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb+resource combination ('batch edit clip names', 'batch create clips') and the word 'bulk/batch' distinguishes it from the single-item siblings set_clip_name and create_clip. It stops short of naming those siblings explicitly, so an agent must infer the routing itself.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The phrase 'in a single round trip' implies this is the efficient choice when touching many clips, but there is no explicit when-to-use or when-not-to-use guidance and no named alternatives. Usage is only implied from the 'batch' framing.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
bulk_set_device_parametersB
Batch update multiple device parameters in a single round trip.
| Name | Required | Description | Default |
|---|---|---|---|
| parameters | Yes | Parameters to set |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full behavioral burden. It says 'single round trip' but never discloses whether the batch is atomic, what happens on partial failure (invalid index mid-array), whether writes are reversible, or what the response contains — all critical for a mutation tool with zero annotation coverage.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single tight sentence with no filler, and the batch/round-trip benefit is front-loaded. Every word earns its place.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a mutation tool with no annotations and no output schema, the description omits atomicity/partial-failure behavior, error semantics, and any note on how this differs operationally from the singular sibling. An agent lacks enough to call it confidently in edge cases.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is nominally 100%, but the nested item fields (track_index, device_index, parameter_index, value) have no descriptions at all and the array description is the tautology 'Parameters to set'. The description adds nothing about index semantics or value ranges; per the high-coverage baseline a 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb (batch update) and resource (device parameters), and the phrase 'multiple ... in a single round trip' implicitly distinguishes it from the singular sibling set_device_parameter. It does not name that sibling explicitly, so the differentiation is inferable rather than stated.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The word 'batch'/'multiple' implies you should use this instead of set_device_parameter when setting more than one parameter, but no when-to-use or when-not-to-use condition is stated and the alternative tool is never named. Usage is left to inference.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
create_clipC
Create a new MIDI clip in a clip slot.
| Name | Required | Description | Default |
|---|---|---|---|
| name | No | Optional name for created clip | |
| length | No | Length in beats (default 4.0) | |
| clip_index | Yes | 0-indexed clip slot position | |
| track_index | Yes | 0-indexed track position |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full behavioral burden. It says 'create' (a mutation) but omits whether an existing clip in the slot is overwritten or an error is raised, what permissions/context are required, and what the call returns after creating the clip.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single front-loaded sentence with no filler, stating verb, resource, and location. It is efficient, though its brevity is a symptom of missing guidance rather than of tight editing.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a mutation tool with no annotations and no output schema, the description should cover the failure mode for an occupied slot and what the agent receives back. With those omitted, an agent cannot safely predict the result of calling it.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so all four parameters (name, length, clip_index, track_index) are already documented in the schema. The description adds no extra semantics such as indexing base or length units beyond what the schema states, so the baseline 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description states a specific verb and resource (create a MIDI clip) and scopes it to a clip slot, which is clearer than a bare restatement. It does not, however, distinguish this tool from siblings like create_midi_track or bulk_edit_clips, so an agent must infer the boundary.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
There is no when-to-use guidance, no mention of prerequisites (track must exist, slot must be empty), and no reference to alternative tools such as create_midi_track or bulk_edit_clips. The agent gets no routing help beyond the name.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
create_midi_trackC
Create a new MIDI track.
| Name | Required | Description | Default |
|---|---|---|---|
| index | No | 0-indexed track insert position, or -1 for end of list |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full behavioral burden. 'Create' implies a mutation, but nothing is said about required permissions, whether the new track is auto-armed or selected, side effects on existing tracks, or the returned handle — a significant gap for a mutation tool with zero annotation coverage.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The single sentence is front-loaded and waste-free, but it is essentially the tool name restated, so its brevity reflects under-specification rather than disciplined concision.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a 1-parameter mutation tool with no annotations and no output schema, the description omits behavior an agent needs: insertion semantics when index is omitted, effect on the session/track list, and any confirmation of what is created beyond the bare action.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the lone 'index' parameter (0-indexed insert position, -1 for end) is fully documented in the schema. The description adds nothing beyond that, which is the expected baseline when the schema does the work.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb and resource ('Create a new MIDI track'), which is unambiguous about the operation. It does not, however, distinguish itself from siblings that also create objects (create_clip) or explain how it relates to get_track_structure / set_track_name.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
There is no guidance on when to use this over alternatives, no prerequisites, and no mention of what happens when the track list is already populated. An agent must infer everything from the name and the single parameter.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
delete_clipC
Delete clip from clip slot.
| Name | Required | Description | Default |
|---|---|---|---|
| clip_index | Yes | 0-indexed clip slot position | |
| track_index | Yes | 0-indexed track position |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full behavioral burden. For a destructive mutation it says nothing about irreversibility, whether the underlying clip data is lost, whether an empty/occupied slot matters, or what happens on an invalid index — all of which an agent needs before invoking a delete.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single front-loaded sentence with no filler or redundancy. It is arguably too terse for a destructive operation, but it is well-formed and wastes nothing.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
The tool is simple (2 fully documented params, no output schema), so the structural information is complete enough to call it correctly. However, with no annotations and no output schema, the destructive semantics and failure behavior are never communicated, leaving a real gap for a delete operation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%: both track_index and clip_index are documented as 0-indexed positions directly in the schema. The description adds no format, range, or indexing detail beyond that, so the baseline 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb and resource ("Delete clip") plus the scope ("from clip slot"), which is enough to separate it from siblings like create_clip, fire_clip and stop_clip. It does not explicitly name an alternative, but the purpose itself is unambiguous.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
There is no guidance on when to delete versus other clip operations, no prerequisites (e.g. clip must exist, track must not be armed), and no mention of related siblings such as create_clip or bulk_edit_clips. The agent must infer all usage conditions from the name alone.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
edit_clip_notesB
Add or replace MIDI notes in a clip. In "replace" mode, existing notes are cleared first before writing the new note list.
| Name | Required | Description | Default |
|---|---|---|---|
| mode | Yes | "add" to append notes to clip, "replace" to clear existing notes and write new note list | |
| notes | Yes | Array of MIDI note objects | |
| clip_index | Yes | 0-indexed clip slot position | |
| track_index | Yes | 0-indexed track position |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden, and it does disclose the key destructive trait: in replace mode existing notes are cleared first. It does not cover required permissions, behavior on missing clips/tracks, note validation errors, or whether add is idempotent, leaving real gaps for a mutation tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Two tightly written sentences with the destructive replace behavior front-loaded after the core purpose. No filler, no redundancy beyond the necessary mode clarification.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a mutation tool with no annotations and no output schema, the description covers purpose and the destructive replace path but omits error/edge-case behavior and any indication of what is returned on success. Adequate but with clear gaps.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so all four parameters including the mode enum and note fields are already documented. The description restates mode semantics already present in the schema rather than adding new meaning, so the baseline 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb set (add/replace) and resource (MIDI notes in a clip), which is clear and action-oriented. It implicitly contrasts with get_clip_notes (read) but never explicitly names the sibling it complements or differs from, so differentiation remains inferential.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No when-to-use guidance is given: nothing tells the agent when to prefer this over bulk_edit_clips, or when using it is inappropriate (e.g. audio clips, invalid indices). The add/replace distinction is explained, but that is mode selection, not tool selection.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
eval_pythonB
Evaluate raw Python code on the Ableton Remote Script instance (for development and advanced debugging).
| Name | Required | Description | Default |
|---|---|---|---|
| code | Yes | Python expression or script to execute on self |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It does disclose that code runs against the Remote Script instance, which conveys the execution context, but it omits the safety-relevant traits of arbitrary code execution: no mention of sandboxing, side effects, mutability of the Ableton session, error behavior, or what is returned.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
One sentence, front-loaded with the verb and resource, with the qualifying context in a compact parenthetical. Nothing is wasted, though it is arguably under-specified rather than optimally concise.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a tool that executes arbitrary code against a live host with no annotations and no output schema, the description is too thin. It should at minimum say what the code has access to, whether effects are persistent, and what a call returns or raises.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100% for the single 'code' parameter, so the schema already documents it. The description adds only marginal context by naming the target instance, which loosely corresponds to the schema's 'execute on self'. Baseline 3 applies when the schema does the heavy lifting.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb (Evaluate), resource (raw Python code), and execution target (the Ableton Remote Script instance). It is unambiguous and clearly distinct from every sibling, which are all narrow get_/set_ operations. It stops short of 5 only because it doesn't frame itself as the general-purpose escape hatch relative to those siblings.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The parenthetical '(for development and advanced debugging)' implies when to reach for it, suggesting it is not the primary path for routine operations. However, it never states conditions or explicitly tells the agent to prefer the dedicated sibling tools instead, so the guidance is implied rather than explicit.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
fire_clipC
Fire a clip slot in Session view.
| Name | Required | Description | Default |
|---|---|---|---|
| clip_index | Yes | 0-indexed clip slot position | |
| track_index | Yes | 0-indexed track position |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description bears the full behavioral burden. It does not disclose what 'firing' actually does (quantized launch, begins looping playback), what happens if the slot is empty, or whether it can trigger recording — all material for a mutation-style trigger action.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single front-loaded sentence with no filler. It is efficient, though the brevity borders on under-specification for a domain-specific term like 'fire'.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a two-parameter trigger with full schema coverage and no output schema, this is close to adequate, but 'fire' is Ableton jargon whose effect (launch/loop playback of the slot) is never explained. A short clause on what firing does would close the gap.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, with both parameters documented as 0-indexed positions, so the schema already does the heavy lifting. The description adds no positional or format context beyond that, which is the correct baseline when coverage is this high.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb ('fire') and resource ('clip slot in Session view'), which is enough to distinguish it from stop_clip and fire_scene conceptually. However, it never names those siblings or contrasts itself with them, so the differentiation is left to inference.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
There is no guidance on when to use this versus fire_scene, stop_clip, or start_playback, and no prerequisites or exclusion conditions are given. The agent must guess from the name alone.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
fire_sceneC
Fire a scene in Session view.
| Name | Required | Description | Default |
|---|---|---|---|
| scene_index | Yes | 0-indexed scene position |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full burden but only states the action. It does not explain what firing a scene does behaviorally (e.g., launching all clips in the scene, interaction with currently playing clips, quantization) or whether it is a read or write operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The single sentence is front-loaded, with no wasted words. However, its extreme brevity leaves no room for necessary behavioral context, making it slightly under-sized for an action tool with no annotations.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a no-annotation, no-output-schema action tool, the description omits what firing a scene does, any side effects or return values, and any error conditions. It is not complete enough for an agent to invoke it reliably without external knowledge.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, and the single parameter scene_index is fully documented in the schema as '0-indexed scene position.' The description adds no additional meaning or constraints beyond the schema, so the baseline of 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description states a specific verb ('Fire') and resource ('scene') with the context 'Session view,' making the core action clear. It distinguishes from siblings like fire_clip by resource, but does not explicitly name or differentiate alternatives, so it falls short of a 5.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance is provided on when to use this tool versus alternatives such as fire_clip, stop_clip, or stop_all_clips. It also omits prerequisites like whether playback must be running or a scene must be selected.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
get_browser_itemsB
Get browser items at a given category path (e.g. "instruments/Simpler").
| Name | Required | Description | Default |
|---|---|---|---|
| path | Yes | Path in browser tree e.g. "instruments/Simpler" |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full behavioral burden. It implies a read via 'Get' but never states the return shape, whether results are paginated, or how it differs behaviorally from get_browser_tree. For a tool with zero annotation coverage this leaves significant gaps.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single front-loaded sentence with an inline example and zero waste. Efficient and easy to parse, though it could carry one more clause of routing guidance without becoming bloated.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a one-parameter read tool this is minimally adequate, but with no output schema the description should clarify what 'browser items' actually returns and how it relates to get_browser_tree. The distinction from the sibling tree tool is left entirely unaddressed.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100% and the single 'path' parameter is fully documented with the same example in the schema. The description adds nothing beyond what the schema already provides, so the baseline 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb+resource ('Get browser items') scoped by a category path, and the example ('instruments/Simpler') makes the domain concrete. However, it does not distinguish itself from the sibling get_browser_tree, so an agent cannot tell from the description alone which of the two to call.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Usage is only implied: the path example hints you drill into a category. There is no explicit when-to-use statement, no prerequisite (e.g. needing a valid tree path), and no mention of the related get_browser_tree or load_browser_item tools.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
get_browser_treeB
Explore top-level categories in Live browser (instruments, sounds, drums, audio_effects, midi_effects).
| Name | Required | Description | Default |
|---|---|---|---|
| category_type | No | Category filter |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are supplied, so the description carries the full behavioral burden and does not meet it. It never states that this is a read-only operation, whether the result is hierarchical/nested, or how the tree is returned or bounded — meaningful gaps for an exploration tool with zero annotation coverage.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single efficient sentence with the resource front-loaded. The trailing parenthetical largely duplicates enum values already in the schema, which is mild redundancy rather than padding.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a one-optional-parameter read tool this is close to sufficient, but with no annotations and no output schema the description should at minimum indicate the read-only nature and the shape of the returned tree. It leaves those to inference.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100% and the single enum parameter is fully documented in the schema, so the baseline is 3. The description's parenthetical merely repeats the schema's enum values (and omits 'all'), adding no syntax or filtering semantics beyond what the schema already provides.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description states a specific verb and resource: exploring top-level categories in the Live browser, with a concrete list of the categories. It is clear what the tool returns conceptually, though it never distinguishes itself from the sibling get_browser_items, which an agent would plausibly confuse it with.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Usage is only implied: 'explore' suggests this is a discovery/navigation step, presumably before fetching items. No explicit when-to-use, when-not-to-use, or named alternative (e.g. get_browser_items) is provided, so the agent must infer the workflow.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
get_bulk_session_structureA
Retrieve full session structure (tempo, scenes, tracks with clips summary and device counts) in a single batched call.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden. It does disclose the shape of what is returned (tempo, scenes, tracks with clips summary, device counts) and that it is a read operation, but says nothing about response size, cost, or latency tradeoffs of a 'full' session dump.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single front-loaded sentence with the resource and payload contents stated immediately; no filler or redundancy.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
No output schema exists, so the description must convey return values; it partially does by listing tempo, scenes, tracks/clips summary, and device counts. It still leaves the boundary with get_session_info and get_track_structure undefined, which matters in a family this crowded.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The tool takes zero parameters, so the baseline is 4. Nothing in the description is needed to explain parameter usage.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb (Retrieve) and resource (full session structure) and enumerates the payload contents: tempo, scenes, tracks with clips summary and device counts. However, it offers no differentiation from close siblings like get_session_info and get_track_structure, so an agent cannot tell from the description alone which of these to pick.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The phrase 'in a single batched call' implies the use case (fetch everything at once rather than making multiple granular calls), but no explicit when-to-use or when-not-to-use guidance is given relative to get_session_info or get_track_structure.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
get_clip_notesB
Read all MIDI notes from a clip in a track clip slot.
| Name | Required | Description | Default |
|---|---|---|---|
| clip_index | Yes | 0-indexed clip slot position | |
| track_index | Yes | 0-indexed track position |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the burden. It discloses that this is a read operation returning all notes, which implies non-mutating behavior, but it says nothing about return format, ordering, or behavior on an empty clip.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single efficient sentence with the verb and resource front-loaded. No filler or redundancy, though it is minimal enough that it sacrifices some useful detail.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple two-parameter read tool with full schema coverage this is roughly adequate, but with no output schema the description gives no hint of the returned note structure, leaving a small but real gap.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, with both track_index and clip_index documented as 0-indexed positions, so the baseline is 3. The description's 'track clip slot' phrasing adds only marginal framing beyond the schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb (Read) and resource (all MIDI notes from a clip in a track clip slot), and the 'get_' prefix plus resource make it distinguishable from the sibling edit_clip_notes. It does not explicitly name the sibling alternative, so it falls short of a 5.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description gives no when-to-use/when-not guidance and does not name alternatives such as edit_clip_notes for writes. Usage is only inferable from the verb 'Read'.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
get_device_parametersA
Get parameter list for a specific device on a track, including index, name, current value, min, max.
| Name | Required | Description | Default |
|---|---|---|---|
| track_index | Yes | 0-indexed track position | |
| device_index | Yes | 0-indexed device position |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden, and it does disclose the return payload contents (index, name, current value, min, max) — genuinely valuable since there is no output schema. It says nothing about out-of-range indices, error behavior, or that the operation is non-mutating, leaving some behavioral gaps.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single front-loaded sentence with zero filler; the resource is stated before the return fields, which is the right order for scanning.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a two-parameter read tool with no output schema, the description supplies the return shape that the structured fields cannot, making it largely self-sufficient. It omits error/edge-case behavior, which keeps it short of a 5.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, with both track_index and device_index documented as 0-indexed in the schema itself. The description adds no parameter meaning beyond that, so the baseline 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description states a specific verb and resource ('Get parameter list for a specific device on a track') and even enumerates the returned fields. It is distinguishable from set_device_parameter and bulk_set_device_parameters by the read verb, but it never names those siblings explicitly.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
There is no when-to-use or when-not-to-use guidance and no named alternative. An agent must infer that this is the inspection call to pair with set_device_parameter or bulk_set_device_parameters before mutating.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
get_healthA
Ping Ableton Live Remote Script TCP bridge, report connection status, script version, and available capabilities.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden, but it does disclose what the call reports (connection status, script version, capabilities), which is the key behavioral trait here. It does not state what happens when the bridge is unreachable, whether the call blocks times out, or confirm the operation is side-effect free.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single front-loaded sentence with no filler; the action and the returned information are stated immediately and nothing is repeated from structured fields.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
With no annotations and no output schema, the description sensibly takes on the return-value role by naming status, version, and capabilities. The only gap is failure/timeout semantics when the TCP bridge is down, which an agent would want to know for a diagnostic call.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The tool takes zero parameters, so by the stated baseline this scores 4. There is nothing for the description to disambiguate beyond the empty input schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States specific verbs (ping, report) and the exact resource (Ableton Live Remote Script TCP bridge) plus the three things it reports: connection status, script version, capabilities. This is clearly distinguishable from siblings like get_session_info, which concerns session content rather than bridge connectivity.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No explicit when-to-use or when-not-to-use statement, and no alternative tool is named. However, framing it as a ping that reports connection status strongly implies its role as a preflight/connectivity check before issuing the many set_* and get_* tools.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
get_session_infoA
Get global session metadata including tempo, time signature, track counts, and master track state.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden, but 'Get' adequately signals a side-effect-free read. It does disclose the returned field set, which is useful, yet says nothing about whether the session must be connected, whether values are live, or what happens if no session is loaded.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single sentence, front-loaded with the verb and scope, with the payload enumerated after. Every clause earns its place and nothing is padded.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
With no output schema and no annotations, the description must convey return content, and it does enumerate the main fields. For a zero-parameter read tool this is close to sufficient; the only shortfall is the absence of guidance relative to the other session-reading siblings.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The tool takes zero parameters, so the baseline of 4 applies. The description correctly adds no parameter detail because none exists, and the schema is fully self-describing.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
Specific verb 'Get' plus a precisely scoped resource ('global session metadata') with an enumerated payload: tempo, time signature, track counts, master track state. The word 'global' implicitly separates it from track-scoped siblings like get_track_structure and get_track_detail, though no sibling is named outright.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
Usage is only implied: the 'global' framing suggests this is the top-level overview call, in contrast to the per-track getters. There is no explicit statement of when to prefer this over get_bulk_session_structure or get_health, and no exclusions or prerequisites.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
get_track_detailA
Get detailed information for a specific track, including session clip slots, arrangement clips, and device list.
| Name | Required | Description | Default |
|---|---|---|---|
| track_index | Yes | 0-indexed track position |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full disclosure burden. 'Get' implies a read-only operation and the sentence lists the returned content (clip slots, arrangement clips, devices), which is useful, but it says nothing about permissions, cost, or behavior for an invalid track_index.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single front-loaded sentence with no filler; the verb, resource, and returned payload are all in the first clause. Nothing to trim.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a one-parameter read tool with no output schema, the description adequately compensates by naming the three content groups returned. With no annotations and no output schema, it is nearly complete, though it omits error behavior for out-of-range indices.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100% and the single parameter is fully documented as '0-indexed track position', so the schema already carries parameter meaning. The description adds no indexing or format detail beyond it; baseline 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb ('Get') and resource ('track detail') and enumerates what the detail includes: session clip slots, arrangement clips, and device list. It does not explicitly distinguish itself from the sibling get_track_structure, so the agent must infer the boundary, which keeps it short of a 5.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The phrase 'for a specific track' implies the tool is the per-track deep-dive entry point, but no when-to-use conditions or alternatives (e.g. get_track_structure, get_bulk_session_structure) are named. Usage is inferable but not stated.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
get_track_structureA
Get summary of all tracks in the session including group tracks, group membership, and arm/mute/solo status.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full behavioral burden. 'Get' and the enumeration of returned fields make clear this is a non-mutating read that reports arm/mute/solo state, but it says nothing about scope limits, ordering, or freshness of the data. Adequate but thin for a zero-annotation tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single sentence with the operation front-loaded and no filler. Every clause adds a distinct content category the caller will receive.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
With no output schema, the description does double duty by naming what is returned (group tracks, membership, arm/mute/solo), which largely covers the return contract for a simple no-arg read. It could be more complete about ordering or nesting, but nothing essential is missing.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The tool takes zero parameters, so there is no parameter semantics to document and the baseline is 4. Nothing in the description conflicts with the empty schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb ('Get') and resource ('track structure') and enumerates the concrete contents: group tracks, group membership, and arm/mute/solo status. It is clearly distinguishable from get_track_detail (detail vs summary) in spirit, though it never names that sibling explicitly.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The word 'summary' implies an overview use case, so an agent can infer when to reach for this over get_track_detail or get_bulk_session_structure. But there is no explicit when-to-use or when-not-to-use statement, and no mention of the sibling alternatives.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
load_browser_itemC
Load a browser item onto a track by URI.
| Name | Required | Description | Default |
|---|---|---|---|
| item_uri | Yes | URI of browser item | |
| track_index | Yes | 0-indexed track position |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden, and it discloses nothing about behavior: not what 'loading' actually does (adds a device, preset, or clip?), whether it requires a particular track type, whether it overwrites or appends to existing track content, or whether the operation is reversible. For a mutation tool this is a substantial gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single well-formed sentence with the action and identifying parameter front-loaded; nothing is wasted, though the terseness borders on under-specification rather than true economy.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a mutation tool with no annotations and no output schema, the description is too thin — it omits what gets created or modified on the track, any required permissions or state, and what the caller should expect afterward. The schema covers inputs but the behavioral picture is largely missing.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, with both item_uri and track_index documented inline, so the schema already does the heavy lifting. The description restates the URI mechanism but adds no format, example, or index-base detail beyond the schema's '0-indexed track position'.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description states a specific verb and resource — 'Load a browser item onto a track' — with the URI as the identifying mechanism, which distinguishes it from the read-only siblings get_browser_tree and get_browser_items. It is clear on its own, though it never explicitly contrasts itself with those siblings.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
There is no guidance on when to use this versus alternatives, nor any stated prerequisite such as first retrieving a valid URI via get_browser_items. The agent must infer the entire workflow from the description alone.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
set_clip_colorC
Set color of a clip using integer RGB color code.
| Name | Required | Description | Default |
|---|---|---|---|
| color | Yes | Integer RGB color value | |
| clip_index | Yes | 0-indexed clip position | |
| track_index | Yes | 0-indexed track position |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden for what is inherently a mutation. It does not state that track_index/clip_index must reference an existing clip, whether the change is persisted/undoable, or what happens on an invalid index, leaving key behavioral traits undisclosed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single front-loaded sentence with no wasted words; the resource and the color-format constraint come first. It is terse rather than padded, though it is arguably too thin for a mutation tool.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
With a fully documented schema and no output schema, the missing pieces are behavioral rather than structural: prerequisites on index validity and persistence are absent. Adequate but with clear gaps for a write operation with no annotations.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so all three parameters are already documented in the schema, including 'Integer RGB color value'. The description repeats that format without adding encoding detail (e.g. decimal packing of RGB) or index semantics, so it only meets the baseline.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb ('Set') and resource ('color of a clip'), which distinguishes it from the sibling set_track_color by resource noun. It is clear what the tool does, though it does not explicitly name the sibling it contrasts with.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
There is no when-to-use guidance, no prerequisites (e.g. the clip must already exist), and no mention of alternatives such as set_track_color or bulk_edit_clips. The agent must infer all of the routing decisions.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
set_clip_nameC
Rename a clip in a clip slot.
| Name | Required | Description | Default |
|---|---|---|---|
| name | Yes | New name for clip | |
| clip_index | Yes | 0-indexed clip slot position | |
| track_index | Yes | 0-indexed track position |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full behavioral burden. "Rename" implies a mutation, but there is nothing about permissions, whether the existing name is overwritten irreversibly, error behavior for an empty/occupied slot, or what the call returns.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single compact sentence with the verb and resource front-loaded and zero wasted words. It is appropriately sized, though its brevity borders on under-specification for a mutation tool.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
The tool is simple, all three parameters are documented in the schema, and there is no output schema to explain. Still, with no annotations and no behavioral detail, the definition is only minimally complete for an agent to call it correctly in edge cases.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100% – name, clip_index, and track_index are all documented in the schema, including the 0-indexed convention. The description adds no additional meaning (no naming constraints, no length limits), so the baseline 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb ("Rename") and resource ("a clip in a clip slot"), which is clear enough that an agent can distinguish it from siblings like set_track_name or set_clip_color. However, it does not explicitly differentiate itself from those analogues in the text, making it clear but not maximally disambiguating.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description gives no when-to-use guidance, no prerequisites (e.g. clip slot must exist), and no mention of alternatives such as bulk_edit_clips. The agent must infer usage entirely from the name.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
set_device_parameterC
Set value of a device parameter.
| Name | Required | Description | Default |
|---|---|---|---|
| value | Yes | Parameter value | |
| track_index | Yes | 0-indexed track position | |
| device_index | Yes | 0-indexed device position | |
| parameter_index | Yes | 0-indexed parameter position |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full behavioral burden and delivers essentially nothing beyond the implied state change. It does not say whether the parameter must exist, how out-of-range indices or values are handled, whether the change is reversible/undoable, or whether it takes effect immediately on a live device.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single six-word sentence with no filler or redundancy, correctly front-loading the action. It is efficient, though it borders on under-specification rather than genuine conciseness given the tool's four required parameters.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a mutation tool with no annotations, no output schema, and four required parameters, the description is far too thin. An agent gets no information about failure modes, index bounds, or what is returned after the call, all of which matter for a device-mutating operation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the four required parameters are already documented as 0-indexed positions and a numeric value. The description adds no additional meaning about valid ranges, units, or normalized vs. raw values, so the baseline 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description names a specific verb ('Set') and resource ('value of a device parameter'), so the agent knows the basic operation. It does not, however, distinguish itself from the sibling tools bulk_set_device_parameters or get_device_parameters, leaving ambiguity about single-vs-bulk and read-vs-write selection.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
There is no when-to-use guidance, no mention of the bulk alternative, and no stated prerequisites. The agent must infer from the name alone that this sets one parameter on one device and that the bulk sibling exists for multi-parameter work.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
set_scene_nameC
Rename a scene in Session view.
| Name | Required | Description | Default |
|---|---|---|---|
| name | Yes | New name for the scene | |
| scene_index | Yes | 0-indexed scene position |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full behavioral burden, yet it only says 'rename' without disclosing whether the scene must already exist, what happens on an out-of-range index, whether the change is persisted, or what is returned. 'In Session view' is the sole piece of extra context and does not cover any mutation semantics.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single short clause with no filler and the resource front-loaded; nothing needs trimming. It is efficient, though so terse that the brevity borders on under-specification rather than disciplined conciseness.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
The tool is simple with two fully documented required parameters and no output schema, so the description is minimally adequate. It still leaves mutation-relevant questions unanswered (index validity, persistence, error behavior) for a tool with zero annotation coverage.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100% and both parameters are self-documented ('New name for the scene', '0-indexed scene position'), so the description adds nothing beyond the schema. The baseline of 3 applies when the schema does the heavy lifting.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb and resource (rename a scene) and even scopes it to Session view, so the agent knows exactly what changes. However, it offers no differentiation from the closely related siblings set_track_name and set_clip_name, which share the same verb and could be confused at a glance.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
There is no when-to-use guidance, no prerequisites, and no mention of alternatives such as set_track_name or set_clip_name for renaming other entities. The agent must infer that this tool is for scenes only from the name.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
set_tempoB
Set session tempo in BPM.
| Name | Required | Description | Default |
|---|---|---|---|
| tempo | Yes | BPM tempo value (e.g. 120.0) |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden and discloses almost nothing: it does not state valid BPM ranges, persistence/undo behavior, whether the change is immediate or quantized, or whether it requires an active session. For a mutation tool with zero annotation coverage this is a real gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
One short, front-loaded sentence with zero filler. Nothing is wasted and the core action is stated first.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple single-parameter setter with full schema coverage and no output schema, the description is minimally adequate, but it omits constraints (valid range, timing/quantization, session requirements) that an agent would need to invoke it confidently.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100% and the schema already documents the single parameter as 'BPM tempo value (e.g. 120.0)', so the description adds no meaning beyond it. Baseline 3 applies when the schema does the heavy lifting.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description gives a specific verb and resource ('Set session tempo') and the unit (BPM), which is unambiguous and unique among the siblings — no other tool touches tempo. It does not explicitly differentiate itself from sibling setters, but none overlap, so the gap is minor.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
There is no when-to-use guidance, no prerequisites (e.g., whether playback must be stopped, whether this affects existing automation), and no mention of alternatives or related tools. The agent is left to infer all of that.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
set_track_armB
Arm or disarm a track for recording.
| Name | Required | Description | Default |
|---|---|---|---|
| arm | Yes | True to arm, false to disarm | |
| track_index | Yes | 0-indexed track position |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden and discloses only the basic effect. It does not say what arming changes downstream, whether arming one track disarms another, whether a session/permission is required, or what the call returns. That is a notable gap for a mutation tool with zero annotation coverage.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single front-loaded sentence with no filler. It is appropriately sized, though extremely terse, leaving room for the behavioral context that is missing elsewhere.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a two-parameter boolean toggle with no output schema, the description covers the minimal essentials. Given no annotations and a state-changing operation, it is adequate but thin on side effects and prerequisites.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100% and both parameters are self-documenting (boolean arm, 0-indexed track), so the baseline of 3 applies. The description adds no syntax or format detail beyond the schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb pair (arm/disarm) and the resource (a track), plus the motivating purpose 'for recording'. It is instantly distinguishable from siblings like set_track_mute and set_track_solo, though it does not explicitly contrast itself with them.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The phrase 'for recording' implies the context in which arming matters, but there is no explicit when-to-use/when-not guidance or named alternatives. For a simple boolean toggle this is adequate but leaves the agent to infer the workflow.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
set_track_colorB
Set color of a track using integer RGB color code.
| Name | Required | Description | Default |
|---|---|---|---|
| color | Yes | Integer RGB color value | |
| track_index | Yes | 0-indexed track position |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations at all, the description carries the full behavioral burden, and it says nothing about persistence, required session state, or what happens on an out-of-range index. The only behavioral hint is that it is a mutation, implied by "Set".
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
One short sentence with the action and format front-loaded and no filler. Nothing to trim.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
A simple two-parameter setter with full schema coverage and no output schema, so the core contract is covered. However, with zero annotations the description should still say whether the track must already exist or whether the color is RGB vs. a native color index — details an agent would need to call it correctly.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so both parameters are already documented in the schema; the description only restates the color format ("integer RGB color code") without adding range, encoding, or indexing detail. Baseline 3 applies when the schema does the work.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb and resource ("Set color of a track"), which implicitly separates it from the similarly-named sibling set_clip_color. It does not explicitly name any alternative, so it stops short of a 5.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance on when to use this versus set_clip_color or the other set_track_* mutators, and no preconditions (e.g. track must exist, session must be live). Usage is only inferable from the name.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
set_track_muteB
Mute or unmute a track.
| Name | Required | Description | Default |
|---|---|---|---|
| mute | Yes | True to mute, false to unmute | |
| track_index | Yes | 0-indexed track position |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are supplied, so the description carries the full behavioral burden, yet it discloses nothing about error handling for an out-of-range track_index, idempotency, or whether the change persists or is live-only. It does at least make clear this is a mutation, but that is the bare minimum.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single short sentence that front-loads the action with zero filler. For a two-parameter toggle there is no wasted verbiage.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple, fully-documented two-parameter tool with no output schema, the description is just barely sufficient. It is missing failure-mode and session-context information that an agent would need to invoke it confidently, but the low complexity keeps the gap small.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100% — both track_index ('0-indexed track position') and mute ('True to mute, false to unmute') are fully documented in the schema. The description adds nothing beyond that, so the baseline 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description gives a specific verb pair (mute/unmute) and a clear resource (track), so an agent can immediately tell it apart from set_track_solo, set_track_arm, and set_track_name. It stops short of explicitly naming those siblings, but the action is unambiguous.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
There is no guidance on when to use this tool versus the adjacent siblings (set_track_solo, set_track_arm) or any prerequisites such as needing an active session. The one-line description leaves all usage context to inference.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
set_track_nameB
Rename a track.
| Name | Required | Description | Default |
|---|---|---|---|
| name | Yes | New name for the track | |
| track_index | Yes | 0-indexed track position |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure, but it only says 'Rename a track.' It does not state whether the operation is persistent, what permissions are needed, whether it overwrites an existing name, or what is returned. The verb implies a write operation, but no further behavioral context is provided.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single front-loaded sentence with no wasted words. It is appropriately sized for a simple two-parameter tool.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the simple two-parameter schema and no output schema, the description is minimally sufficient for invocation. However, because there are no annotations, it should ideally disclose the mutation's side effects or permissions, and it leaves that behavioral context entirely absent.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so the schema already documents both required parameters ('track_index' and 'name'). The description adds no additional syntax, format, or constraint information beyond what the schema provides, making the baseline score of 3 appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description states a specific verb ('Rename') and resource ('track'), making the tool's action immediately clear. It distinguishes itself from siblings such as set_track_color, set_clip_name, and set_scene_name by naming the track resource explicitly.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
There is no guidance on when to use this tool instead of alternatives like set_clip_name or set_scene_name. The description only restates the tool's purpose and gives no conditions, prerequisites, or exclusions.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
set_track_soloC
Solo or unsolo a track.
| Name | Required | Description | Default |
|---|---|---|---|
| solo | Yes | True to solo, false to unsolo | |
| track_index | Yes | 0-indexed track position |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden. It doesn't say whether the operation requires playback, whether soloing is exclusive vs additive, what happens to other tracks, or whether unsoloing all restores silence.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
One short sentence with zero waste, front-loading the operation. It is appropriately sized for a simple toggle.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a mutation tool with no annotations, no output schema, and no sibling differentiation, the description is too thin. It omits behavioral details such as exclusivity, permissions, or return behavior that an agent would need to invoke it confidently.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so the schema already documents both parameters (solo meaning and 0-indexed track position). The description adds nothing beyond the schema, so baseline 3 applies.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description states a specific verb (solo/unsolo) and resource (a track), so the operation is unambiguous. It doesn't explicitly differentiate from siblings like set_track_mute or set_track_arm, though the resource is distinct enough to infer.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance on when to use this versus its siblings (e.g., set_track_mute for muting). It's a single terse sentence with no context or exclusions.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
start_playbackB
Start global transport playback.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full behavioral burden, and it discloses almost nothing: it does not say whether playback resumes from the current position or from the start, what happens if transport is already running, or whether the action is idempotent. The only implicit signal is that 'Start' mutates transport state.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single grammatical sentence with the verb front-loaded and no filler. It is efficient, though its brevity edges toward under-specification rather than tight economy.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a zero-argument transport command with no output schema and no annotations, a one-line description is close to sufficient. Still, it omits the transport semantics (resume vs. restart, effect on existing clips) that an agent would need to call it with confidence.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The tool takes zero parameters, so there is no parameter semantics to document; the baseline for a 0-parameter tool is 4. Nothing in the description contradicts or misrepresents the empty schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description names a specific verb (Start) and resource (global transport playback), which is more precise than the bare tool name. It is clearly separable from the sibling stop_playback by the verb alone, but it never names or contrasts with that sibling explicitly.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
There is no when-to-use guidance, no mention of prerequisites (e.g. whether a session/clip must exist first), and no reference to the stop_playback alternative. Usage is only weakly inferable from the verb 'Start'.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
stop_all_clipsB
Stop playing all session clips.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden. It conveys a clear action but does not disclose whether global playback/transport is also halted, whether the operation is safe to repeat, or what the effect on currently recording tracks is. For a trivial no-param action this is a minor but real gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single front-loaded sentence with no waste, appropriate for a zero-parameter action. It is borderline terse, but the lean wording fits the trivially simple operation.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
No output schema and no annotations mean the description is the only documentation, and it omits any note on the relationship to stop_playback or the resulting state. Adequate for such a simple tool but not complete.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The tool takes zero parameters, so there is nothing for the description to disambiguate. Baseline 4 applies for a no-parameter tool.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb ('stop') and resource ('all session clips'), and the word 'all' implicitly distinguishes it from the single-target sibling stop_clip. However, it never names an alternative or clarifies the boundary with stop_playback, so it falls short of explicit sibling differentiation.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
There is no when-to-use guidance, no mention of alternatives such as stop_clip or stop_playback, and no stated preconditions. The agent must infer usage entirely from the name.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
stop_clipC
Stop a clip slot.
| Name | Required | Description | Default |
|---|---|---|---|
| clip_index | Yes | 0-indexed clip slot position | |
| track_index | Yes | 0-indexed track position |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full behavioral burden, and it says almost nothing. It does not state whether the clip must currently be playing, whether stopping is idempotent, what happens to queued clips, or what errors occur on an invalid index.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
It is a single front-loaded sentence with zero filler, which is structurally clean. But the brevity tips into under-specification: the sentence is too thin to justify itself for a tool with real behavioral questions.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple two-parameter mutation with no annotations and no output schema, the description should at least clarify effect and failure modes. It leaves the agent guessing about scope (one slot vs. the whole track) and about what a successful stop returns.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, with both track_index and clip_index documented as 0-indexed positions, so the schema already does the heavy lifting. The description adds no indexing convention, range, or coordinate context beyond that, which is the expected baseline.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb and resource ('Stop a clip slot'), so the agent knows this halts playback of one clip slot. However, it offers no differentiation from nearby siblings like stop_all_clips, stop_playback, or fire_clip, so the agent must infer scope from the name alone.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
There is no when-to-use guidance and no mention of alternatives, even though stop_all_clips and stop_playback sit in the same sibling set. The agent gets no rule for choosing this tool over stopping everything.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
stop_playbackA
Stop global transport playback.
| Name | Required | Description | Default |
|---|---|---|---|
No parameters | |||
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full behavioral burden, and it discloses almost nothing beyond the action itself. It does not say whether the playhead position is retained or reset, whether the call is idempotent, or what happens if transport is already stopped.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
A single front-loaded sentence with no filler. Nothing needs to be added for it to be readable and direct.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a zero-parameter, zero-annotation, output-schema-less action, the description is nearly sufficient: the scope (global transport) is stated. It could add one clause about state effects or idempotency, but little else is required at this complexity.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The tool takes zero parameters, so there is nothing for the description to explain; the baseline of 4 applies. No parameter-level meaning is missing.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
States a specific verb (stop) and resource (global transport playback), which implicitly distinguishes it from clip-level siblings like stop_clip and stop_all_clips. It does not name an alternative explicitly, but the 'global transport' scope is clear enough for correct selection.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The phrase 'global transport' implies this is the master play/stop control rather than a clip-level stop, which mildly guides usage. However, it never states when to prefer this over stop_all_clips or stop_clip, nor any preconditions (e.g. that playback must be running).
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
33 tool updates
v1.0.0- First observed
bulk_edit_clips - First observed
bulk_set_device_parameters - First observed
create_clip - First observed
create_midi_track - First observed
delete_clip - First observed
edit_clip_notes - First observed
eval_python - First observed
fire_clip - First observed
fire_scene - First observed
get_browser_items - First observed
get_browser_tree - First observed
get_bulk_session_structure - First observed
get_clip_notes - First observed
get_device_parameters - First observed
get_health - First observed
get_session_info - First observed
get_track_detail - First observed
get_track_structure - First observed
load_browser_item - First observed
set_clip_color - First observed
set_clip_name - First observed
set_device_parameter - First observed
set_scene_name - First observed
set_tempo - First observed
set_track_arm - First observed
set_track_color - First observed
set_track_mute - First observed
set_track_name - First observed
set_track_solo - First observed
start_playback - First observed
stop_all_clips - First observed
stop_clip - First observed
stop_playback
TDQS
Scored across 33 tools
Most tools have clearly distinct purposes, but there is overlap among retrieval tools (get_session_info, get_track_structure, get_bulk_session_structure) and between bulk and single-operation tools (e.g., create_clip vs. bulk_edit_clips). Descriptions clarify these differences, so misselection is unlikely but possible.
All tool names use snake_case and follow a consistent verb_noun pattern (get_*, set_*, create_*, fire_*, stop_*, etc.), with only minor variations like the 'bulk' prefix. The convention is predictable throughout.
With 33 tools, the server exceeds the typical well-scoped range. While Ableton Live is complex, several tools are convenience duplicates (bulk versions of single operations), making the set feel inflated rather than tightly scoped.
The surface covers many clip, device, and track operations but lacks essential lifecycle and mixer controls: no track deletion, no audio/return track creation, no scene creation/deletion, and no direct track volume/pan/send adjustment. These gaps would cause agent failures in common DAW workflows.
Maintenance
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