ebay_create_negative_keyword

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 states 'Create a negative keyword' without describing side effects, permissions needed, conflict handling, or whether the tool is idempotent. This is insufficient for a mutation tool.

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 sentence that is front-loaded with the core purpose. It contains no filler or redundancy. While it could be expanded slightly, it does not exceed necessary length.

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?

Despite the tool having 4 parameters and no output schema, the description is very brief. It does not explain return values, error conditions, or behavior when required parameters are missing. For a creation tool in a complex ecosystem (eBay ads), more context is needed.

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% (all parameters documented in schema). The description adds context for campaignId and adGroupId by explaining their purpose ('target a specific ad group'), but does not add meaning to negativeKeywordText or negativeKeywordMatchType. Baseline is 3, and the added value is marginal.

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 action ('Create a negative keyword') and the context ('in a priority-strategy CPC campaign'). It mentions the required identifiers (campaignId, adGroupId). However, it does not explicitly distinguish itself from sibling tools like 'ebay_bulk_create_negative_keywords' or 'ebay_update_negative_keyword', though the name and single-entity nature imply the difference.

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?

The description implies usage by stating 'Provide campaignId and adGroupId to target a specific ad group', which gives context for when to use it. However, it lacks explicit guidance on when to use this tool versus alternatives (e.g., bulk operations), and does not mention prerequisites or when not to use it.

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