whoop_get_sleep

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

With no annotations provided, the description carries full responsibility for behavioral disclosure. It only states what data is returned and gives no information about side effects, authentication requirements, error behavior, or data freshness. For a read-only retrieval tool, the absence of any caveats or limitations leaves the agent with limited understanding of what happens under the hood.

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 a single, front-loaded sentence that lists key output fields. Every word contributes value, and there is no redundant or tangential information. It is highly scannable and 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 low complexity (two optional parameters, no output schema) and the presence of an explicit field list, the description covers the essential return content. It does not explain what 'latest' means (e.g., last night's sleep) or mention auth requirements, but these are minor gaps for a simple retrieval tool. The overall context is sufficiently complete.

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 already provides full descriptions for both parameters (include_stages and response_format) with 100% coverage. The tool description adds no extra parameter semantics. As per the baseline, a score of 3 is appropriate when the schema does the heavy lifting.

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 identifies the tool's purpose: retrieving the latest sleep data. It lists specific data points (performance %, stages, efficiency, respiratory rate, disturbances, nap flag), giving a concrete scope. It distinguishes from the history variant by using 'Latest' but does not explicitly name siblings or contrast with them.

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 about when to use this tool versus alternatives like whoop_get_sleep_history or whoop_get_sleep_need. The description implies it returns the most recent sleep data, but it does not explain how to choose between this and the history tool, nor does it mention prerequisites or typical use cases.

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