VendorDirectFulfillmentShipping20211228_createShippingLabels

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

With no annotations, the description carries the full burden. It does disclose that the tool creates labels, returns them, and executes outside the current environment, which is useful. However, it does not mention side effects, prerequisites, idempotency, or failure behavior for a mutation-like operation.

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 short and mostly front-loaded, with the purpose articulated in the second sentence. The opening 'Catalog entry.' fragment is unnecessary and slightly confusing, but the rest is efficient and easy to scan.

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?

The description covers the main action, return value, and external runtime, which is meaningful given the minimal schema and absent output schema. Still, it leaves ambiguity about how the purchase order is identified and does not distinguish when to use this over submitShippingLabelRequest or getShippingLabels. The 'Catalog entry' phrasing also adds mild uncertainty about actual 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?

The input schema defines zero parameters, so the baseline is 4. The description mentions 'purchase order' as the key business object, which is helpful, but it does not specify how the purchase order should be passed. Given the schema is effectively empty, the description adds reasonable contextual meaning.

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, 'Creates shipping labels for a purchase order and returns the labels,' states a specific verb, resource, and outcome. It also implicitly differentiates from sibling tools like getShippingLabels, submitShippingLabelRequest, and createContainerLabel.

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?

Usage is implied by the verb 'creates' and resource 'shipping labels,' but the description offers no explicit when-to-use guidance, no exclusions, and no reference to alternative sibling tools. The 'Runs in your Kuudo deployment' note is a runtime context, not a selection rule.

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