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

The description adds real context beyond annotations: it discloses the paid x402/X-Bazaar-Key model at 0.05 USDC and links a free sample report, which is exactly the kind of cost/auth information annotations cannot convey. Annotations already cover open-world, idempotent, non-destructive behavior, and nothing in the text contradicts them; only the output/report shape is left undisclosed.

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?

Compact and front-loaded: the paid-access tag comes first, then the six checks, then the sample link. It is a single sentence with no filler, though the checks are packed unpunctuated as a run-on list.

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 an open-world, paid composite audit with no output schema, the description should indicate what the report contains (findings, severity, pass/fail per check). It offers a sample-link as a partial substitute and covers cost, but leaves the deliverable and scoring model implicit.

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?

Only one parameter (`issuer`) exists and its schema description ('OIDC/JWT issuer URL') already covers it at 100%, so the schema carries the semantics. The description mentions OIDC discovery and JWT checks but never ties them to the `issuer` input, adding no syntax, format, or default guidance.

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 resource and scope: a composite 6-check API authentication audit enumerating OAuth2 PKCE S256, OIDC discovery, JWT claims, API key checksum format, rate limits, and OWASP API Top 10. That is concrete and verb-like ('audit/chaining'), but it never contrasts with close siblings such as jwt_claims_lint or suite_web_app_security, so an agent must infer which to pick.

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 composite versus the individual lint tools (jwt_claims_lint, caip2_network_check) or adjacent suites. Nothing tells the agent whether the single optional `issuer` parameter is required for a meaningful audit or what happens when it is omitted.

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