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

Annotations already establish readOnlyHint/idempotent/no-destructive, so the safety profile is covered. The description adds real behavioral context beyond the annotations: that supplying the denial date yields only an approximate file-by date, and that the user's own notice governs. It does not describe output shape, but as a read-only lookup that gap is minor.

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 purpose, then example queries, then the accuracy caveat. Slight redundancy in restating the title 'Appeal My Claim. How long someone has to appeal...' before the examples, but every remaining sentence earns its place.

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?

For a read-only, zero-required-parameter lookup with no output schema, the description covers what the caller gets (deadlines/decision windows), the role of denial_date, and a caution about accuracy. Only the literal return shape is unspecified, which is acceptable here.

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 coverage is 100%, so all three parameters are already documented, including the urgent enum and plan_type's cross-reference. The description only loosely ties denial_date to 'the date on the denial notice' — no format or default guidance beyond the schema, so baseline 3 is appropriate.

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 pair ('how long someone has to appeal, and how fast the plan must decide') that clearly distinguishes it from sibling get_appeal_rights and draft_appeal_letter. An agent can pick it apart from the other appealmyclaim tools without opening schemas.

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?

Example user phrasings ('how long do I have to appeal?', 'when is my appeal due?', 'how fast does my insurer have to answer?') give clear triggering context, and it references get_appeal_rights for the plan_type value space. It stops short of stating when NOT to use this tool or what it does not cover.

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