get_sleep_data

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

No annotations are supplied, so the description must disclose behavioral traits. It only states the tool retrieves data; it does not mention permissions, rate limits, data freshness, or any side effects. The agent has no behavioral context beyond the action itself.

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 short sentences: one for purpose and one for the parameter. It is front-loaded with the action and resource, then adds essential format guidance. No extraneous information.

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 tool's simplicity (one required param, no nested objects, output schema exists), the description covers the basic purpose and parameter format. However, it lacks usage guidelines and behavioral context, making it minimally adequate but not fully informative.

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 only defines 'date' as a string with no format constraint. The description adds 'Date in YYYY-MM-DD format,' which compensates for the 0% schema coverage and provides necessary format guidance. However, no further parameter details (e.g., valid ranges) are given.

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 starts with 'Get sleep stages and metrics for a given date,' which clearly states the tool's function. It uses a specific verb ('Get') and resource ('sleep stages and metrics'), and among many sibling 'get' tools, it uniquely focuses on sleep data.

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 alternatives (e.g., get_daily_summary might also include sleep). It only describes the parameter without context on proper usage or exclusions.

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