ebay_update_fulfillment_policy

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

No annotations are present, and the description offers no behavioral insight beyond 'Update'. It fails to disclose side effects, required permissions, rate limits, or any other behavioral traits. For a mutation tool, this is critically insufficient.

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 extremely concise at one sentence. It states the core purpose without fluff, earning its place. However, it could benefit from additional context to be more helpful, but it is not verbose.

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 complex input schema with many nested objects and no output schema, the description is too minimal. It does not explain what happens on success, what the response contains, or any important details about the update process. The agent lacks essential context for correct invocation.

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%, with both parameters documented. The description adds no extra meaning beyond the schema's brief descriptions. Baseline 3 is appropriate as the schema does the heavy lifting, but the description does not enhance understanding.

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 'Update an existing fulfillment policy' clearly states the action (update) and resource (fulfillment policy). It distinguishes from sibling tools like create and delete. However, it lacks specificity on what aspects can be updated, relying on the schema for details.

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 usage guidelines are provided. There is no information on when to use this tool versus alternatives (e.g., creating a new policy or deleting one). The agent has no context on prerequisites or constraints, making selection difficult.

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