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

Annotations already declare this as a read-only, open-world, idempotent, non-destructive operation. The description adds meaningful behavior beyond that: a 100/day per-wallet free allowance, the caller parameter keying that allowance, and a clear scope disclaimer that the audit only grades machine-readiness signals.

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?

The description is front-loaded with the free headline check and then adds quota, return contents, paid-report boundary, and scope disclaimer. It is dense but every sentence carries useful information; the disclaimer is slightly lengthy but justified for a trust-sensitive audit tool.

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 two-parameter read-only precheck with full schema coverage and rich annotations, the description is largely complete: it explains the free allowance, return shape, paid boundary, and audit scope. Output schema absence is mitigated by the explicit mention of verdict, score, and nine criteria states.

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%, so both parameters are already documented in the schema. The description reinforces that the URL is the site being audited and that caller is the wallet keying the free allowance, but adds little beyond what the schema already says.

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 states a specific verb and resource: a free headline readiness check of a website's AI-agent accessibility. It clearly frames the result as a compact verdict/score/criteria snapshot rather than the full paid report, though it does not explicitly name the sibling paid tool.

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 strongly implied: submit a URL to get a free preview, and use the paid report for evidence and fixes. It also states the quota constraint tied to the caller. However, it does not explicitly compare against siblings such as readiness_audit or readiness_criteria, so the agent must infer the routing.

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