inspect_url

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so 'read-only' is partly redundant. The description still earns credit for disclosing a behavioral limitation not captured anywhere else: this tool cannot request indexing. It does not mention quota/rate limits, which the real Search Console URL Inspection API imposes.

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 front-loaded sentence naming the operation, the read-only nature, and the returned fields, followed by a single negative constraint. Every clause earns its place 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?

With no output schema, the description usefully enumerates return fields, partially compensating. But an openWorld read tool with two undocumented parameters and no rate-limit context is only adequately described; the parameter gaps are the main shortfall.

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 33%: site has a description, but url and languageCode have none. The description adds nothing about parameter formats or required combos, so an agent must infer how to supply url and what languageCode does. With low coverage, the description should compensate but does not.

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+resource (URL Inspection) and names the fields returned (verdict, coverage state, last crawl, canonical), so an agent knows exactly what comes back. It does not explicitly distinguish itself from the plural sibling inspect_urls, which is the one remaining ambiguity.

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 exclusion 'Does NOT request indexing (no public API exists for that)' is genuinely useful routing guidance, steering agents away from using this for indexing requests. However it never names an alternative (e.g. inspect_urls for batch, or indexnow_ping for submission), so when-to-use is only implied.

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