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

Annotations already cover read-only, idempotent, and non-destructive behavior, so the safety profile is done. The description contributes beyond that by disclosing that the SEO/GEO analysis is pre-stored and only present 'when available', signalling the agent may get partial or cached results rather than fresh analysis.

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?

One sentence, front-loaded with what the tool returns, with no filler. Nothing in it is redundant with the annotations or schema.

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 carries the burden of describing returns, and 'full audit' plus 'stored SEO/GEO analysis' is vague about what fields or sections actually come back. For a read-only, two-parameter tool this is adequate, but an agent would benefit from knowing the shape of the audit result.

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 both parameters are documented (absolute URL as listed in the sitemap; optional site domain referencing list_sites). The description only echoes the sitemap constraint already in the schema, so schema coverage sets the 3 baseline.

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?

It names a specific verb and resource ('audit of one URL') and adds scope detail ('from the site sitemap'). The purpose is clear, but it does not position itself against related siblings such as get_site_overview, list_urls, or analyze_content.

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?

The sitemap constraint and the 'site optional when one site' hint imply usage, but the description never says when to call this tool rather than crawling, listing URLs, or pulling a site overview. There is no explicit when-not guidance or named alternative.

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