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 still adds non-obvious behavior: re-reading is free and does not consume the allowance, and the page HTML is discarded while the report is retained. That is real value beyond the annotations.

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?

Two tight sentences that front-load what is returned and then the cost/no-retention caveat. The 'costs nothing and does not count against the allowance' phrasing is slightly redundant but each sentence carries useful 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?

With no output schema, the description does minimally describe the return payload ('fixes' per finding) and confirms the report is retained. However it leaves the required guest_token entirely unexplained, so an agent may fumble the call even though the read semantics are clear.

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 coverage is only 50%: `id` is documented in the schema, but `guest_token` has no description anywhere. The tool description never mentions any parameter, so it does nothing to compensate for the undocumented token.

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 and resource ('re-reads an audit already made') and names what comes back ('fixes', the ready fix for each finding). It implies the audit must already exist, which differentiates it from the creation path, but it never names the sibling (e.g. audit_url) that produces that audit.

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 context is implied rather than stated: 'already made' and the cost note signal this is the cheap re-fetch path once an audit ID exists, but there is no explicit when-to-use vs. when-to-create guidance or mention of a prerequisite beyond the required id.

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