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 one useful behavioral fact — the sample is capped at 10 — but says nothing about what the time window means, whether the cap silently truncates a larger requested sample_size, or how the counts are scoped.

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?

It is very short and front-loads the key constraint, with no wasted words, but the telegraphic fragment style ('Top N pages inspected') is cryptic rather than dense — the brevity comes at the cost of comprehension.

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?

An output schema exists, so return values need not be described, but for a tool with a required site_url, a date window, and a language parameter at 0% schema coverage, the definition leaves too much for the agent to infer.

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 0% for four parameters, so the description must compensate. It only partially does: 'Top N' hints at sample_size and the cap clarifies its ceiling, but site_url (required), days, and language_code are left entirely unexplained.

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?

The fragments 'Top N pages inspected; verdict + coverageState counts' convey that this aggregates index-coverage statuses over a sample of pages, but there is no explicit verb+resource statement and no differentiation from siblings like inspect_url, batch_inspect_urls, or archive_status.

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?

There is no when-to-use guidance, no mention of prerequisites (site verification/property access), and no pointer to the per-URL alternatives for drilling into individual pages.

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