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create_midi_track

Create a new MIDI track in your Ableton Live session. Specify an insertion index to place it anywhere in the track list.

Instructions

Create a new MIDI track in the Ableton session.

Parameters:

  • index: The index to insert the track at (-1 = end of list)

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
indexNo
Behavior2/5

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

With no annotations provided, the description carries the full burden. It only restates the action and parameter semantics, and does not disclose side effects, session requirements, or behavior when index is omitted.

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

Conciseness5/5

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

The description is compact and front-loaded: a clear one-line purpose followed by a focused parameter explanation. Every sentence earns its place.

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 tool with one optional parameter, no output schema, and no annotations, the description covers the essential purpose and parameter semantics. It lacks some detail about side effects and alternatives, but is adequate for a simple creation tool.

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?

The description explains the 'index' parameter's meaning and the sentinel value -1, which the schema only lists as a default. This is meaningful additional context for the sole parameter, though the explanation remains brief.

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 'Create a new MIDI track in the Ableton session,' using a specific verb and resource. The 'MIDI' qualifier distinguishes it from sibling tools like create_audio_track and create_group_track.

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 guidance is provided about when to use this tool versus alternatives, nor any prerequisites or exclusions. The intended use is only implied by the action itself, so the description offers little decision support.

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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