create_arrangement_clip

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

With no annotations, the description bears full responsibility for disclosing behavior. It reveals that start_time and length are in beats, but omits details like handling of invalid track_index, return value, side effects, or whether it overwrites existing clips. Incomplete for a creation 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?

The description is short (two sentences) and front-loaded with the core purpose. The second sentence adds essential unit info without extra wording. It could be slightly improved by mentioning the output, but overall it's efficient.

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?

Given the tool has 3 required parameters, no schema descriptions, and no annotations, the description should provide more context. It does not explain the track_index parameter, return value (though output schema exists), or how this clip relates to siblings like 'add_notes_to_clip'. Incomplete for a nontrivial operation.

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 compensate. It adds meaning for start_time and length (in beats) but does not explain track_index (e.g., zero-based indexing, valid range). Two of three parameters get partial clarification, leaving a significant gap.

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?

The description clearly states it creates an empty MIDI clip on the arrangement timeline, specifying the exact resource (empty MIDI clip) and location (arrangement timeline). This distinguishes it from sibling tools like 'create_clip' which may target session view, though not explicitly differentiated.

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?

No guidance is provided on when to use this tool versus alternatives such as 'create_clip' or 'add_notes_to_clip'. The description only explains what the tool does without context for decision-making.

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