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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the safety profile is covered. The description adds the $0.01 cost and the endpoint it hits, which is genuinely useful, but it does not say what the verdict payload looks like or how it is scored; the payment/retry mechanics are disclosed in the parameter schema rather than the description.

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 and waste-free, with the resource, check dimensions, endpoint, and price all in one compact line. The telegraphic style borders on under-specification rather than verbosity.

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, so the description is the only place to learn what a 'verdict card' contains, and it gives only the check categories without the shape of the result. The complex payment handshake is well covered by the schema, which keeps this from being inadequate.

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 the payment parameter carries a detailed explanation of the 402 challenge flow, so the schema does the heavy lifting. The description only alludes to the host parameter via '?host=', adding no syntax or format detail beyond the schema.

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 names a specific resource (agent-readiness verdict card) and enumerates the checks covered (llms.txt, A2A, MCP, TLS, crawlers), so the agent knows exactly what is produced. It does not, however, differentiate itself from close siblings like check_webmcp, get_crawler_policy, or lint_protocol_card.

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?

Usage is implied by the checklist of dimensions covered, which suggests when the tool is relevant, but there is no explicit when-to-use / when-not guidance and no routing to sibling tools such as get_crawler_policy or check_webmcp.

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