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

Goes well beyond the annotations: it discloses that nothing in the diary is modified, that the note is stored in the user's own account and deleted with it, and that no reply is sent. These retention and side-effect facts are exactly the kind of context readOnlyHint/destructiveHint cannot express, and they are consistent with destructiveHint=false and openWorldHint=false.

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?

Front-loaded with the core action and the user's-words constraint, then the side-effect and retention facts. Four sentences that each carry information, though the final sentence could be tightened slightly.

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 a 4-parameter schema at full description coverage, an output schema in place, and annotations covering the safety profile, the description supplies the remaining essentials (verbatim input expectation, no diary mutation, retention, no reply). Nothing an agent needs to call this correctly is missing.

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 three of four parameters carry enum descriptions, so the schema already documents about/category/rating/message fully. The description restates the feedback kinds that mirror the category enum but adds no format or usage detail beyond the schema, which is the baseline-3 case.

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?

States a specific verb+resource ('Sends feedback to Forkmate') and enumerates the four feedback kinds, so an agent can tell exactly what this tool does and that none of the siblings (delete_meal, log_meal, update_meal, etc.) perform this action.

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?

Gives a clear selection condition: it is for feedback the user has asked to send, verbatim in the user's own words rather than a paraphrase, and it changes nothing in the diary. There is no competing sibling to exclude, so the absence of named alternatives costs little.

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