google_ads_keywords_add

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

Discloses mutating nature, reversibility via rollback_apply (with note that rollback pauses, not removes), and duplicate behavior within ad group. Annotations absent, so description carries the burden well.

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 concise sentences: action/return, rollback behavior, duplicate warning. Front-loaded, no extraneous text.

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?

Comprehensive for a 3-param tool: covers return value, rollback edge case, and prerequisite check, even without 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%, baseline 3. Description adds context about customer_id fallback, ad_group_id targeting, and keyword text/match_type details, enhancing understanding beyond schema.

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?

Clearly states it adds keyword criteria to a single ad group and returns the created criterion_ids. Distinguished from siblings like keywords_pause and keywords_remove.

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?

Advises to run google_ads_keywords_cross_adgroup_duplicates first for bulk additions to avoid Google Ads duplicate rejection, providing actionable guidance.

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