google_ads_negative_keywords_add_to_ad_group

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

No annotations provided, but description discloses mutability, reversibility via rollback_apply, and return values (created criterion_ids). No contradictions.

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?

Three sentences covering purpose, scope, return, mutability, reversibility, and usage guidance. No unnecessary words.

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?

Given no output schema, description covers return values, mutability, reversibility, and context for use. All relevant aspects addressed for a 3-param tool.

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 coverage is 100%, so description does not need to add much. It does not elaborate on parameters beyond what schema provides. Baseline of 3 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?

States verb 'Adds', resource 'ad group-level negative keywords', and explicitly notes scope narrower than campaign-level. Distinguishes from sibling tool google_ads_negative_keywords_add.

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?

Provides explicit guidance: 'Prefer this over google_ads_negative_keywords_add when the exclusion is only wrong in one ad group's context.' Also clarifies scope.

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