create_midi_track

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

With no annotations, the description carries the full behavioral burden and does well: it discloses the mutation, that it occurs in one undo step, and the concrete failure mode (TRACK_LIMIT_REACHED at >=96 tracks). It omits permission/auth context and what happens if the index is out of range, but the disclosure is well above average 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?

Tight and front-loaded: purpose first, then labeled Side effects, Example, and Edge cases segments. Every sentence adds distinct value and none is wasted.

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 or output schema, the description covers mutation semantics, undo behavior, and one hard failure mode. The remaining gap is the index parameter's meaning and range, which is needed to call it correctly beyond the default path.

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 0%, so the description must compensate and only partially does. The example illustrates the name parameter, but the index parameter is entirely unexplained in both schema and description, and the default placement behavior is only hinted at by the word "appends".

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") and scopes it to Ableton Live. The MIDI qualifier cleanly distinguishes it from create_audio_track and other create_* siblings without needing the 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?

Usage is implied by the purpose and the edge-case note, but there is no explicit when-to-use or when-not-to-use guidance and no reference to alternatives such as create_audio_track or create_clip. An agent must infer when this is the right tool.

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