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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds value by disclosing that per-sitemap status, error/warning and indexed-count data is returned, but says nothing about failure modes (e.g. unverified property) or result size.

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 the verb and resource, with the payload enumeration trailing. Nothing is wasted and nothing is buried.

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 simple read-only list tool the definition is nearly sufficient: with no output schema, the enumeration of returned fields stands in for return-value documentation, and the sole parameter is fully documented in the schema. Only the absence of sibling-routing guidance keeps it short of complete.

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?

There is a single required parameter with 100% schema description coverage, and the schema already explains the "exact or auto-matched domain/URL" resolution. The description's phrase "submitted for a property" is consistent with that but adds no new syntax; baseline 4 applies for a one-parameter tool with full coverage.

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 ("List sitemaps") scoped to a property, and adds the returned fields (status, errors, warnings, indexed counts). It implicitly contrasts with the singular gsc_get_sitemap sibling, but never names it, so the sibling differentiation is left to the reader.

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 only implied: an agent can infer this is the enumerate-all call for a property's sitemaps. There is no explicit when-to-use vs gsc_get_sitemap, no precondition about the property needing to be verified, and no stated alternative.

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