generate_keyword_ideas

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

No annotations are provided, so the description must disclose behavioral traits. It only says it uses the Keyword Planner, but does not mention that it generates new keyword suggestions (as opposed to returning existing data), nor does it mention any rate limits, authentication requirements, or that it is a read-only operation.

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, concise sentence that front-loads the primary action. There is no fluff or redundant information, making it easy to parse.

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 tool has a moderate complexity with 6 parameters and an output schema. The description is minimally viable but lacks usage context and behavioral details. However, the rich schema and output schema compensate somewhat, as they define valid inputs and return structure.

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 provides 100% coverage with clear descriptions for all parameters, so the baseline is 3. The description adds no parameter-specific meaning, but the schema already explains keywords, page_url, language_id, and geo_target_id.

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 clearly states the verb 'Generate' and the resource 'keyword ideas,' and specifies the method 'Google Ads Keyword Planner.' This distinguishes it from sibling tools like get_keyword_performance or add_keywords, which serve different functions.

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 guidance on when to use this tool versus alternatives. It does not mention prerequisites, such as having a seed keyword or page URL, nor does it clarify that it is for ideation rather than querying existing performance data.

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