Log Weight

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

Annotations indicate idempotentHint=true and readOnlyHint=false, but the description does not clarify critical behavior like whether logging on the same date overwrites or creates a duplicate entry. This gap could lead to misuse despite annotations providing some context.

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 extremely concise, front-loading the purpose and listing parameters in a clear structure. Every sentence is necessary, with no waste.

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?

While the description covers the basics (purpose, params, return), it omits details on overwrite behavior and the structure of the confirmation. Given no output schema, a bit more context would be beneficial, but the annotations partially compensate.

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 100%, and the description's 'Args' nearly repeats schema descriptions verbatim. It adds no new meaning beyond what the schema provides, so it meets the baseline but does not enhance understanding.

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 'Log a weight measurement for a specific date,' which is a specific verb and resource. It distinguishes from sibling tools like fatsecret_get_weights_month (retrieval) and food-related tools, making the purpose unambiguous.

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?

The description implies usage for logging weight, with a default date, but does not explicitly say when not to use it or compare with alternatives. The context of siblings (e.g., a retrieval tool) provides implicit guidance, but no direct exclusions.

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