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

Goes well beyond the readOnly/openWorld annotations by disclosing concrete behaviors: network fetches of sitemaps, index following bounded at 10 files, and live status checks of sampled URLs. It does not mention rate limits, timeouts, or failure handling, but the behavioral profile of a read-only network-bound auditor is unusually well conveyed.

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?

A single dense sentence front-loads the verb and resource, then lists checks in a readable enumeration ending with the return value. It is long but every clause maps to a distinct capability with no filler.

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 audit tool with no output schema, the description covers scope, side effects (network fetches), bounds (10 index files, sampled URLs), and return nature (a list of concrete issues). A note on failure behavior or runtime would be needed for a full 5.

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 100%, so both parameters are already fully documented in the schema (including the 0-to-skip semantics of sampleUrls). The description adds no syntax, format, or default detail beyond it, so baseline 3 applies.

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?

Names a specific verb (audit), specific resources (robots.txt, XML sitemaps), and enumerates the exact checks performed. No sibling tool on the list covers this scope, so it is unambiguously distinguishable.

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 description implies when to use it (site technical SEO audit) but never states when not to use it or names any alternative. Usage is inferable from the enumerated checks rather than explicitly guided.

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