get_sleep

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

No annotations are provided, so the description carries full burden. It does not disclose behavioral traits such as whether the tool is read-only, whether it requires special permissions, or any side effects. It only describes the data content, missing critical behavioral context for an agent to safely invoke the 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 two sentences long and front-loads the key data fields (stages, efficiency, HRV, etc.). It is concise and avoids redundancy, though the structure could be improved with clearer separation between data content and additional notes (e.g., 'Here also lies night HRV'). Overall, 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 that an output schema exists (context signal: has output schema: true), the description need not detail return values, but it does list many of them, which adds value. However, the complete absence of parameter semantics and behavioral transparency leaves gaps. The tool is moderately complete for a straightforward data retrieval tool, but missing crucial context for safe and correct usage.

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 has 4 parameters (raw, end_date, days_back, start_date) with 0% schema description coverage. The description does not mention or explain any parameter, leaving the agent without guidance on how to date parameters impact the query. The description fails to compensate for the complete lack of schema descriptions.

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 lists the specific data fields (stages, efficiency, HRV, resting heart rate, breathing, body temperature deviation, night HRV, lowest_hr) that the tool returns, distinguishing it from sibling tools like get_sleep_score which likely returns only a score. The verb 'get' in the name combined with the detailed list of data makes the purpose highly specific.

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 siblings (e.g., get_sleep_score, get_daily_summary). There is no mention of prerequisites, context, or scenarios where this tool is preferred. The description only lists the data content without any usage direction.

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