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

No annotations are provided, so the description carries the full behavioral burden. It does disclose one genuinely useful trait — that claimant identity is never returned — plus the fields it does report (proof, timestamp). But it omits that the operation is a read, what happens for unclaimed entries, and anything about permissions or rate limits.

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?

A single tightly written sentence with zero padding, and the most distinguishing clause ('never by whom') is placed at the end as a natural caveat. It is efficient, though brevity here edges toward under-specification rather than economy.

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?

There is no output schema and no annotations, so the description must do more work. It partially describes the return contents, but leaves both input parameters and the read-only nature unexplained, making it only minimally adequate given the tool's role in a larger claim workflow.

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 0% and the description says nothing about 'scheme' or 'value'. These two required, undocumented parameters are the core of the call, and the agent is left to guess the intended identifier format; the description does not compensate for the coverage gap.

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 conveys the resource and the shape of the answer (whether a claim exists, by which proof, when, but not by whom), which is more informative than a bare name. However, it is phrased as a question with no verb (lookup/check/report), and it does nothing to distinguish itself from the sibling claim_status, which sounds like the same job. An agent cannot confidently route between the two.

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?

There is no statement of when to use this tool versus claim_status, claim_verify, or entity_lookup. Only the incidental phrase 'never by whom' hints at a privacy condition, but that is not framed as usage guidance or an exclusion that would steer tool selection.

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