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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is covered. The description adds the metric set but says nothing about rate limits, pagination behavior, or data-freshness tradeoffs beyond what the schema's data_state field already conveys. With annotations carrying the behavioral load, this is adequate but not rich.

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?

Two sentences, verb-first and front-loaded, with no filler. Both sentences earn their place, though it is on the terse side for a 7-parameter query tool with no output schema.

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?

No output schema exists, so the description partially compensates by naming the returned metrics, but it does not explain that results are broken down by the requested dimensions or how rows are structured. Combined with 71% param coverage and covered annotations, it is minimally sufficient to call but not fully self-contained.

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 71% and the schema leaves the dimensions array as untyped strings with no enum, so the description's enumeration of valid dimension values ('query', 'page', 'country', 'device', 'date') is genuinely additive rather than a restatement. It still omits guidance on filters/row_limit, but the key gap the schema leaves is filled.

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 ('Query') and resource ('Search Console performance data') and enumerates the returned metrics (clicks, impressions, CTR, position). It implicitly separates this from GA4/ads reporting tools via the Search Console scoping, but never explicitly names an alternative sibling to disambiguate.

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 prerequisites, and no mention of alternatives like ga4_report, rank_report, or gbp_performance. The agent must infer that this is the SEO-search-performance reporting tool from the name alone.

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