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Ableton MCP Server

create_audio_track

Add a new audio track to an Ableton Live Set, optionally naming it or inserting it at a specific index.

Instructions

Create a new audio track in Ableton Live.

Side effects: mutates the Set by adding an audio track in one undo step. Example: create_audio_track(name="vocals") appends a named audio track; create_audio_track(index=2) inserts at position 2. Edge cases: raises LIVE_UNAVAILABLE when the Live host does not expose Song.create_audio_track. Note: this audio variant does not reuse the 96-track TRACK_LIMIT_REACHED guard — Live itself enforces the per-host track cap.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameNo
indexNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.7.0

TDQS

A3.7/5.0
Behavior5/5

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

With no annotations provided, the description carries the full burden and meets it: it discloses the mutation and its one-undo-step reversibility, the LIVE_UNAVAILABLE error condition, and a subtle caveat that the 96-track TRACK_LIMIT_REACHED guard does not apply here. This is exactly the kind of behavioral context annotations would otherwise supply.

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

Conciseness4/5

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

Front-loaded with the purpose, then side effects, examples, and edge cases in a logical order. Dense but every section earns its place; the prose is slightly terse in spots but not padded.

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

Completeness4/5

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 side effects, error behavior, and track-limit nuances well. It stops short of stating what is returned or any host/permission prerequisites, but is largely complete for correct invocation.

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

Parameters3/5

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

Schema coverage is 0%, so the description must compensate. It partially does via examples (name='vocals' appends a named track; index=2 inserts at position 2), but it never explains the meaning of the default index=-1 or the null default for name, leaving the default/append semantics to inference.

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

Purpose4/5

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 audio track in Ableton Live') and the phrase 'this audio variant' implicitly signals the existence of a MIDI counterpart. It distinguishes the tool well but never explicitly names the sibling create_midi_track, so an agent must infer the pairing.

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?

The examples show how to call it (name vs index) but offer no guidance on when to use an audio track versus a MIDI track or other creation tools. There is no when-to-use, when-not-to-use, or alternative-selection guidance.

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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