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

The annotation declares readOnlyHint=true, and the description adds substantial behavioral context: it runs multiple analyses in a single call, returns a comprehensive set of audio metrics, and requires a filename. It does not describe failure modes, but given the read-only annotation, the description adds enough useful context beyond what annotations provide.

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 somewhat long, but it is well-structured: purpose, pipeline context, parameter explanation, return fields, and a usage example. Each section adds practical value, though the example repeats some return-field info. It is appropriately sized for the tool's composite nature.

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 all essential aspects: what it does, when to use it, how the parameter is specified, what it returns, and a concrete usage example. With an output schema present, the return-value listing is extra but helpful. There are no significant gaps for an agent to invoke it correctly.

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 input schema provides zero description for the filename parameter (schema description coverage is 0%). The description fully compensates by explaining both accepted forms: a filename relative to the exports directory or an absolute path to any WAV file, and includes an example. This is excellent parameter-level guidance.

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 opens with 'Full audio analysis in one call — BPM + key + LUFS + duration + dynamic range' which explicitly states what the tool does. It further clarifies that it is a composite of detect_bpm + detect_key + measure_lufs, clearly distinguishing this integrated tool from its single-purpose siblings.

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 clear usage context: it is a composite tool that eliminates three separate calls and is essential for the Suno remix pipeline. It names the individual tools being combined, but does not explicitly state when one would prefer the single-purpose alternatives over this composite, though that is implied by the efficiency rationale.

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