ebay_opt_in_to_program

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

No annotations are provided, and the description fails to disclose any behavioral traits such as side effects, permissions required, idempotency, or reversibility. The agent has no insight into what 'opt-in' entails beyond the mutation.

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 short sentence, which is concise but at the expense of providing necessary information. It earns a mid score because it is not verbose, but it is too minimal to be effective.

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 that it is a mutation tool with no output schema and only one parameter (a nested object with a string field), the description is severely lacking. It omits outcomes, error scenarios, or any context needed to use the tool effectively.

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 description adds no meaning beyond the input schema. The 'programType' parameter is required but not enumerated or explained, and the schema's own description is generic. The description does not compensate for the lack of parameter details.

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 'Opt-in to a seller program' which indicates the action but lacks specificity about which programs are available or how it differs from siblings like 'ebay_opt_in_to_payments_program'. It provides a general verb-resource pair but not enough to distinguish clearly.

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 given on when to use this tool versus alternatives. The description does not mention contexts, prerequisites, or when to opt-in versus opt-out, leaving the agent without decision support.

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