producer_variation_music

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

No annotations are provided, so the description carries the full burden. It discloses that the tool creates a 'new version' (implying non-destructive behavior) and that it returns a 'Task ID,' hinting at asynchronous processing. However, it does not disclose permissions, rate limits, or processing time expectations, which would be valuable for a generative 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 well-structured: a one-sentence summary, a second sentence elaborating on the output, a bulleted 'Use this when' list, and a 'Returns' section. Each sentence earns its place, and the content is front-loaded with the most important information.

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?

The description covers the tool's purpose, usage scenarios, and return value ('Task ID and the variation audio information'). With an output schema present, it doesn't need to detail return values further. It doesn't explicitly mention the asynchronous nature beyond the 'Task ID' hint, but given the schema's documentation of the async parameter, this is a minor gap.

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?

The schema description coverage is 100%, so the baseline is 3. The description itself does not add any parameter-specific information; it relies entirely on the schema to explain audio_id, model, style, prompt, async, and callback_url. This is acceptable given the schema's thoroughness.

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 the tool's function with a specific verb and resource: 'Create a variation of an existing song with modifications.' It further explains that it generates a new version with 'subtle changes to the arrangement, melody, or style while keeping the overall structure similar.' This distinguishes it from sibling tools like cover_music, extend_music, and replace_section, which imply different transformations.

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?

The description provides a clear 'Use this when' section with three explicit scenarios: liking a song but wanting a slightly different version, exploring different interpretations, and needing multiple takes. However, it does not mention when not to use it or explicitly name alternatives, so it falls short of a 5.

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