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

Annotations declare readOnlyHint=false and destructiveHint=false but say nothing about what happens to the submitted data; the description adds the substantive fact that entries are 'held for verification, never auto-trusted', which materially affects agent behavior. It still doesn't cover idempotency (re-submitting the same card) or what happens on verification failure, despite idempotentHint=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?

Three dense sentences with the audience and action front-loaded, followed by the trust caveat and the claim flow. No filler; every clause carries operational information.

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 submission/claim lifecycle is well conveyed and the card payload is delegated to an external schema, which is reasonable for a heavily nested object. However, with no output schema and no explanation of the response beyond an implied submission_id, and three undocumented top-level parameters, an agent still lacks enough to call this correctly in edge cases (duplicate submissions, missing domain match).

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 only 25% and the description explains just one of four parameters indirectly, via the linked card schema URL and the notion of a publisher domain. The `claim` boolean, `contact`, and `agent_id` are undocumented in both description and schema, so the description fails to compensate for the low coverage.

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 pair (submit or claim) and a precise resource (Agent Tool Card), plus the target audience (tool makers). No sibling tool does card submission, and the description names verify_claim as the follow-up, so an agent can place it in the workflow without opening the schema.

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 the exact claim procedure: serve 'toolwork-claim=<submission_id>' at /.well-known/agent-tool-card-claim.txt on the publisher domain, then call verify_claim(submission_id). Usage context is clear and procedural, but there is no statement of when not to use it or when a plain submit (without claim) is appropriate.

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