ebay_find_campaign_by_ad_reference

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

The description does not disclose any behavioral traits such as idempotency, rate limits, error conditions, or whether it is a read-only operation. Annotations are absent, so the description carries the full burden but fails to provide any such context.

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 very concise (one sentence), but it is under-specified. It lacks front-loaded essential information and omits details that would be useful for an agent.

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 the tool has three optional parameters and no output schema, the description is woefully incomplete. It does not explain return values, parameter selection criteria, or any usage context beyond a vague purpose.

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?

The schema provides generic descriptions for each parameter (e.g., 'listingId optional endpoint parameter'), and the tool description adds no additional meaning. It does not clarify how the parameters relate to 'ad reference' or how they should be used together.

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 states the verb 'Find' and the resource 'campaign by ad reference', which distinguishes it from sibling tools like ebay_get_campaign_by_name. However, 'ad reference' is ambiguous and not explicitly defined in terms of the parameters.

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?

No guidance is provided on when to use this tool versus alternatives (e.g., ebay_get_campaign_by_name, ebay_get_campaigns). There is no mention of prerequisites or typical use cases.

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