Domain Overview DB

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

No annotations are provided, so the description must carry full weight. It only states 'Fetch' with no details on side effects, data freshness, rate limits, or response structure. It does not disclose if the operation is read-only or has any behavioral traits.

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 extremely concise (one sentence) but at the cost of completeness. It fails to convey essential information, making it under-specified rather than efficiently precise.

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 and a complex domain (keyword statistics over regional databases), the description is insufficient. It does not explain what the response contains or how the three parameters interact. The agent would lack key information to validate results.

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% with clear descriptions for each parameter (source as country code, domain as keyword statistics, with_subdomains flag). The tool description adds no additional meaning beyond the schema, so baseline 3 is appropriate.

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 'Fetch domain overview by database (v1/domain/overview/db)' is nearly a tautology of the tool name, providing no explanation of what 'overview' entails or how it differs from sibling tools like domainOverview, domainOverviewWorldwide, etc. The parameter description for 'domain' mentioning 'keyword statistics' introduces ambiguity.

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 offers no guidance on when to use this tool versus alternatives. There is no mention of prerequisites, context, or exclusions. The agent is left to infer usage solely from the parameters.

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