google_ads_negative_keywords_add

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

No annotations exist, but the description fully discloses the mutating nature, irreversibility, and need for manual rollback via mureo_state_action_log_append. Also states that keywords apply to all ad groups.

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?

Concise single paragraph with clear, front-loaded purpose. Each sentence adds value: purpose, scope, rollback warning, and sibling differentiation. No redundant information.

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?

Covers purpose, usage, behavioral implications, parameter details, and mentions return value (criterion_ids). No output schema, but return indication is sufficient for a mutation 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%, baseline 3. The description adds guidance: plain text for keywords, match_type enum details, and recommends EXACT as safest. Provides extra context 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?

The description clearly states the tool adds campaign-level negative keywords, specifies scope (applies to all ad groups), and differentiates from the sibling tool for ad-group scope.

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?

Explicitly provides when-to-use and when-not-to-use guidance: directs to google_ads_negative_keywords_add_to_ad_group for ad-group negatives and warns about potential over-blocking. Also advises recording before-state for rollback.

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