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

Annotations already declare readOnlyHint=true, idempotentHint=true, openWorldHint=true and destructiveHint=false, so the safety profile is covered structurally. The description adds the useful detail of which inspection categories are returned, but omits quota/rate-limit behavior (URL Inspection has strict daily quotas) and any auth requirements.

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 front-loaded sentence with the verb and resource first, followed by the inspection facets. No filler or redundancy; every clause earns its place.

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 read-only, two-parameter tool with full annotations and no output schema, the enumeration of inspected facets effectively previews the return surface and is nearly complete. Only the quota/rate-limit dimension that affects calling behavior is missing.

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 ('Optional GSC site URL' and 'The fully qualified URL to inspect'). The description adds no syntax, format, or defaulting guidance beyond the schema, so the 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?

Specific verb ('Inspect') + scoped resource ('a specific URL on Google Search Console') plus an enumeration of the exact data surfaced (indexing state, crawl status, robots.txt allowance, canonical URLs, mobile usability). This clearly separates it from the aggregate siblings like google_search_console_get_top_pages and get_top_queries.

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?

'Inspect a specific URL' implies per-URL, diagnostic usage as opposed to the aggregate GSC reporting tools, but the description never states when to prefer this over siblings, nor any prerequisites (e.g., property ownership) or exclusions. Usage is inferable but not articulated.

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