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

With no annotations, the description carries the full burden of behavioral disclosure. However, it only states what data is returned, with no mention of output format, data source, limits on the number of keywords, or any side effects. It does not even explicitly state that this is a read-only operation, though it is implied by 'Get'.

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 entire description is a single, front-loaded sentence with no filler words. It conveys the core purpose immediately and efficiently.

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?

The description is adequate for a simple data retrieval tool with a complete schema, but it does not specify important details such as the output format/return value, any batch size limits for the keyword array, or the effect of the country and currency parameters. Given the lack of an output schema, more context would be helpful.

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?

The input schema has 100% coverage, so all parameters are already described. The description adds a marginal benefit by linking the tool's purpose to the 'keywords' parameter, but it does not explain the role of country or currency beyond what the schema already states.

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 uses the specific verb 'Get' and clearly identifies the resource (a set of keywords) and the data returned (Volume, CPC, competition). This distinguishes it from sibling tools like get_related_keywords or get_domain_keywords, which focus on discovering keywords rather than returning metrics.

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?

No explicit guidance is provided on when to use this tool versus alternatives. The description implies its use when the user has a set of keywords and needs volume/CPC/competition data, but it does not mention any exclusions or alternative tools for related use cases.

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