ListingsItems_getListingsItem

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

With no annotations provided, the description must carry the full burden of behavioral disclosure. It only says the tool 'returns details' and mentions a deployment context; it does not disclose required authorization, whether this is a read-only catalog lookup, how results are scoped, or what happens when the item is not found. The description is too thin for an agent to form correct behavioral expectations.

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 to the point, but 'Catalog entry' is a fragment that adds little value. The two substantive sentences could be rearranged so the actual purpose is front-loaded, and 'Runs in your Kuudo deployment, not here' is too cryptic to earn its place without elaboration.

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?

There is no output schema, no annotations, and an empty input schema, so the description is the only source of completion. It fails to mention how to identify the item, what data will be returned, or any relationship to sibling ListingsItems tools. The description is too incomplete for reliable tool selection and 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 is empty but additionalProperties is true, meaning parameters are effectively undocumented. The description does not mention sellerId, SKU, or marketplaceIds needed to identify the listings item. For a get-details tool, the absence of any parameter guidance makes it impossible for an agent to know how to invoke it correctly.

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 a clear verb and resource: 'Returns details about a listings item for a selling partner.' This distinguishes it from mutating siblings like put, patch, and delete, though it does not explicitly differentiate from the older ListingsItems20200901 variant. 'Catalog entry' is vague filler but does not undermine the core purpose.

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 about when to use this tool instead of searchListingsItems, deleteListingsItem, patchListingsItem, putListingsItem, or the 2020-09-01 variants. The cryptic note 'Runs in your Kuudo deployment, not here' hints at an environment constraint but does not explain selection criteria or prerequisites.

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