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

With no annotations, the description carries the burden. It discloses the time-limited nature (expires in 1 hour), the signed URL output, and the Pro/Enterprise API key requirement. These are non-obvious behavioral traits that an agent must know before calling. It does not mention response format or error cases, but the core behaviors are covered.

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?

Three concise sentences, each adding unique value: purpose and expiry, key requirement, and usage timing. No redundancy; information is front-loaded with the purpose statement.

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 tool is simple (one param, no output schema) and the description covers the essential operational constraints (expiry, key requirement, usage timing). It does not discuss rate limits or error handling, but those are less critical given the simplicity. Overall, it is sufficiently complete for an agent to invoke 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?

Schema coverage is 100%, and the schema already describes 'id' as 'The sound id returned by search_sounds.' The description adds no extra parameter context, but since the schema is fully descriptive, the baseline of 3 applies.

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 returns a time-limited signed download URL for a sound, specifying the expiry (1 hour) and the resource. This distinguishes it from siblings like search_sounds (search) and get_sound (likely metadata retrieval) by emphasizing the signed URL behavior.

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 condition: 'Only call this when the user is ready to download.' It does not explicitly name alternatives, but the purpose statement implies this is for the final download step, which is sufficient guidance given the sibling tools' distinct purposes.

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