get_stats_and_body

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

No annotations are present, and the description does not disclose whether the operation is read-only, whether it has side effects, or any other behavioral characteristics. Since the name implies a GET, it is likely read-only, but this is not explicitly stated, and the lack of annotations leaves the burden on the description.

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 and to the point, using a single sentence that directly states the purpose. There is no extraneous information or verbose wording.

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 description explains what data is retrieved (stats and body composition) but does not specify the structure or content of the response. Given the tool has no output schema, this could lead to uncertainty about the exact fields returned. However, for a simple getter, this level of detail may be acceptable.

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 only parameter, date, is clearly described with the expected format (YYYY-MM-DD). This provides sufficient semantic meaning for the parameter, though no additional constraints (e.g., required range) are mentioned.

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 action (get) and the resource (stats and body composition data), distinguishing it from sibling tools like get_stats or get_body_composition by combining both. However, 'stats' is somewhat vague and could be interpreted as multiple data types.

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 the many sibling tools that retrieve similar data (e.g., get_stats, get_body_composition, get_user_summary). The description does not mention any conditions or preferences for choosing this tool.

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