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

The annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the description's '[read]' prefix adds no new information. Beyond annotations, it only mentions 'over the window' and does not explain how the date window is resolved, what happens when no website identifier is supplied, or what the response contains.

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?

The description is a single front-loaded sentence with little wasted text. The redundant '[read]' marker is minor, but the extreme terseness leaves necessary detail out rather than being genuinely efficient.

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 tool with seven optional parameters, no output schema, and several closely named siblings, the description is too thin. It does not explain date-window behavior, optional filters, identifier selection, or expected output, leaving the agent to infer critical invocation details.

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 seven parameters, so the description carries the burden of explaining them. It mentions only the website identifier options and vaguely refers to a window, leaving days, device, country, start_date, end_date, defaults, and the interaction between 'days' and explicit dates undocumented.

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 description names a specific verb and resource: Search Console clicks, impressions, ctr, and position per day for a website. It makes the daily granularity clear, but it does not explicitly distinguish this tool from siblings such as gservice_query_breakdown, gservice_query_grouped, or gservice_query_summary.

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 description gives no explicit guidance on when to use this tool versus the other gservice_query_* siblings. It implies a daily Search Console query but does not state use cases, exclusions, or which alternative to choose for breakdowns, grouped data, or summaries.

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