create_audio_track

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

Annotations already establish that this is a non-read-only, non-destructive, closed-world mutation, so the safety profile is covered. The description adds the insertion-position convention but says nothing about post-creation effects an agent might care about — default track naming, whether selection or armed state changes, or what happens with an out-of-range index. Useful but thin beyond the annotations.

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?

Purpose and the sibling disambiguation are front-loaded in the first two sentences, and the parameter list is compact. Slightly redundant to restate parameters in prose when a schema exists, but that restatement is justified here by the zero coverage in the schema.

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?

An output schema exists, so return values need no explanation, and the tool itself is a simple two-parameter mutation. The only gaps are edge-case behavior (invalid index, duplicate/limit conditions) that an agent might hit when 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 0%, so the description must carry the load, and it does: both parameters are explained, including the non-obvious sentinel 'index: -1 = end of list' and the telemetry-only purpose of user_prompt. It stops short of bounds/validation behavior for index, which would be the final detail needed for a 5.

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 audio track in the Ableton session') and immediately contrasts it with the sibling that creates a different track type. An agent can distinguish it from create_midi_track and create_return_track without inspecting either schema.

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?

Explicitly names the use case ('recorded or imported audio (samples, stems, vocals)') and the exclusion, routing MIDI-instrument needs to create_midi_track. This is a direct when-to-use/when-not-to-use statement with the alternative named.

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