get_sleep_data

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

No annotations provided, so the description must carry the burden. It discloses the types of data included (sleep stages, heart rate, HRV, breathing rate) but does not mention behavioral aspects like timezone handling, date range limits, pagination, or whether it returns multiple sessions. The output schema exists but is not shown.

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 concise: one sentence for the purpose and two lines for parameters. No redundant information. Front-loaded with the core function.

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?

With 2 parameters and an output schema, the description is mostly adequate but lacks clarity on whether the tool returns a single session or multiple, and how date ranges affect the result. Given the output schema exists, the description could be more precise about what the output contains.

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 description coverage is 0%, but the description adds meaning for both parameters: start_date and end_date with formats (YYYY-MM-DD) and defaults. This compensates for the missing 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 states the verb 'Get' and the resource 'detailed sleep session data', listing specific data types (sleep stages, heart rate, HRV, breathing rate). It distinguishes itself from siblings like get_daily_sleep (likely less detailed) and get_sleep_time (only time).

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 on when to use this tool vs alternatives such as get_daily_sleep or get_sleep_time. The description only explains what it does, not the context for choosing it over siblings.

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