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Ableton MCP Extended

Ableton MCP Extended

by RichieMiller-HU
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Local

set_track_arm

Arm or disarm a track for recording or input monitoring by specifying the track index and armed status.

Instructions

Arm or disarm a track for recording / input monitoring.

Parameters:

  • track_index: The index of the track

  • armed: True to arm, False to disarm

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "track_index": "<track_index>"
    },
    "name": "set_track_arm"
  }
}

Input Schema

NameRequiredDescriptionDefault
armedNo
track_indexYes

Output Schema

NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

B3.3/5.0
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations provided, so description bears full burden. It states the action but lacks details on side effects (e.g., whether arming triggers immediate recording), permissions needed, or reversibility.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness3/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is concise but includes a parameter list that largely duplicates the input schema. Could be tighter by omitting the list and integrating meanings into the prose.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists, so return values are covered. However, the description lacks information on error conditions, edge cases (e.g., arming an already armed track), or constraints (e.g., track must exist). Adequate but not thorough.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

With 0% schema description coverage, the description compensates by explaining both parameters in plain language: track_index and armed (true to arm, false to disarm). This adds value beyond the bare schema properties.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool arms or disarms a track for recording/input monitoring, with a specific verb ('arm/disarm') and resource ('track'). It distinguishes from sibling tools like set_track_mute or set_track_solo.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No explicit guidance on when to use this tool versus alternatives (e.g., set_track_monitor, set_track_mute). No prerequisites or context provided for usage.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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