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

The '[read]' marker and annotations (readOnlyHint, idempotentHint, destructiveHint=false) already establish the safety profile, so the description is not required to restate it. It adds genuinely useful behavior detail in defining click-delta semantics and the default striking-distance window of 8-20, but leaves the default lookback period, how the website argument pair is resolved when both are omitted (0 required params), and any result limits or rate constraints unexplained.

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?

A single dense sentence that front-loads the tool's identity and parenthetically scopes the website selector, then enumerates outputs. It is efficient with no filler, though the packed parenthetical and nested parentheses make it slightly harder to scan than a short bulleted structure would be.

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 10-parameter analytics tool with no output schema and no per-parameter schema documentation, the description is thin: it does not state the default time window, whether website selection is mandatory in practice, units/format for dates, or what a result row contains. An agent would have to guess on several inputs before calling it.

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%, so the description must carry parameter meaning. It clarifies only 4 of 10 parameters: seliee_website_id and seliee_website_uuid (mutually alternative website selectors), and striking_min/striking_max with their default range. It says nothing about days, start_date/end_date, device, country, or min_impressions, which are the filters most likely to be mis-set.

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 concrete resource (Search Console query data) and enumerates the three specific analyses returned: winners & losers by click delta, striking-distance queries, and low-CTR queries. The verb is really 'analyze/report on' rather than a single crisp action, and the four sibling tools (gservice_query_summary, _breakdown, _daily, _grouped) are never referenced, so the agent cannot tell from this text alone which query tool to pick.

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?

Usage is only implied by the output categories: if you want ranking-gap or CTR opportunities, this is the tool. There is no statement of when to prefer it over gservice_query_summary or gservice_query_grouped, no prerequisites (e.g. Search Console must be connected), and no exclusions.

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