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

readOnlyHint=true already tells the agent this is a safe read. The description adds a genuinely non-obvious behavioral detail — responses follow the account language, German by default — which affects how results are interpreted. It does not mention data freshness, row limits, or pagination beyond what the schema already states.

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?

Three short sentences, front-loaded with the core purpose and metrics, followed by use case and then the locale caveat. No filler, though the middle sentence is more motivational than operational.

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 does the necessary work of naming the returned fields (pages, clicks, impressions, average position) plus the response-language caveat. Missing only secondary details like staleness of the data or how many pages are returned given the limit cap of 25.

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 domainId, window, and limit are all documented in the schema, including the enum and defaults. The description only reinforces the single-domain scoping ("one domain"); baseline 3 is appropriate when the schema carries the parameter burden.

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 combination — page-level Search Console performance for one domain — and names the concrete metrics returned (clicks, impressions, average position). It is clear what the tool does, but it never distinguishes itself from the sibling search_console_queries, which an agent could easily confuse for page-level data.

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?

"Useful to find the pages that carry the organic traffic and the ones that underperform" implies usage but gives no explicit when-to-use or when-not-to-use rules. The nearest alternative, search_console_queries, is never mentioned, so the agent must infer from sibling names which one to pick.

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