ebay_create_package

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

No annotations are provided, so the description carries full burden. It only states 'Create' which implies a write operation, but does not disclose authentication requirements, rate limits, destructive effects, return behavior, or any side effects. For a creation tool, this is insufficient transparency.

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, front-loaded sentence with no wasted words. However, it is arguably too sparse, lacking detail that would improve usefulness. It earns its place but could be expanded slightly without harming conciseness.

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 one required nested parameter and no output schema, the description should explain what the package request object must contain, what the response will be, and how this fits into the package lifecycle. The current description does not provide sufficient context for an agent to use the tool correctly, especially among many package-related sibling tools.

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% (one parameter described), but the description adds no extra meaning beyond 'Package creation data' already in the schema. The nested object's structure is not clarified, and no hints about required fields or format are given. Baseline 3 is appropriate since schema covers the parameter but description adds no value.

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 verb 'Create' and the resource 'package' with a specific scope 'for international shipping'. This distinguishes it from sibling tools that perform other operations on packages (e.g., cancel, confirm, delete, get, clone) and from tools for domestic shipping or other contexts.

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 provides no guidance on when to use this tool versus alternatives. It does not specify prerequisites, exclusions, or mention related sibling tools such as ebay_create_shipping_fulfillment or ebay_confirm_package. An agent would not know when international shipping applies or if there are other package creation methods.

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