google_ads_negative_keywords_add_to_ad_group

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

Discloses mutating nature, non-reversibility, and suggests recording before-state. Mentions return of criterion_ids. Lacks permission requirements or limits, but strong for missing annotations.

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?

Four sentences, front-loaded with main action, includes usage guideline and behavioral warning. No wasted 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?

Provides purpose, usage guidance, behavioral caveat, return value, and alternative reference. Complete for a 3-param tool with no output schema.

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%; description does not add meaning beyond schema. 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?

Clear verb ('Adds') and resource ('ad group-level negative keywords'). Explicitly distinguishes from campaign-level negatives and 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?

States when to prefer this tool over the sibling (when exclusion only applies to one ad group). Also clarifies scope difference.

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