VendorDirectFulfillmentShipping20211228_getShippingLabels

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

With no annotations, the description carries the full burden, and it does disclose that this is a read-style operation returning a list and that the execution context may be elsewhere ('Runs in your Kuudo deployment, not here'). However, that deployment statement is ambiguous about whether calling it here will fail or route elsewhere, and there is no mention of pagination, authentication, or response shape.

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 three short sentences with no filler, and every sentence contributes information. It is not optimally front-loaded because the actual purpose statement appears last, after the less operationally important 'Catalog entry' and deployment context.

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 empty input schema, lack of output schema, absence of annotations, and presence of a very similar V1 sibling, the description leaves too much unresolved: the time-frame parameter is not defined in the schema, the response format is not described, and the version distinction is not explained. It is a useful summary but not a complete enough specification for an agent to invoke confidently.

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?

There are zero defined parameters, so the baseline is 4, and the description adds a useful hint that a time frame can be specified. It does not name the exact parameter or its format, leaving the hint underspecified, but it still provides meaning beyond the empty schema.

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 core sentence 'Returns a list of shipping labels created during the time frame that you specify' names a specific verb, resource, and filtering criterion, so the tool's basic purpose is clear. However, it does not distinguish this from the similarly named VendorDirectFulfillmentShippingV1_getShippingLabels sibling, and the opening 'Catalog entry / Runs in your Kuudo deployment, not here' muddies whether the tool is actually invocable in this environment.

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 gives no explicit guidance about when to use this tool versus the singular getShippingLabel, the V1 getShippingLabels, or related submit/create operations. No alternative-selection criteria, exclusions, or context-dependent recommendations are provided.

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