ListingsItems20200901_putListingsItem

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

With no annotations, the description must carry the behavioral disclosure burden. It does add meaningful traits: full replacement behavior ('fully-updates') and an execution-location caveat ('Runs in your Kuudo deployment, not here'). However, it omits side effects, permissions, idempotency, and response/error behavior, so transparency is only partial.

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, but it opens with the near-tautological 'Catalog entry' and only reaches the actionable purpose in the final sentence. It is concise without being well-structured or front-loaded with the most useful information.

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?

For a state-changing operation with no annotations, no output schema, an effectively empty input schema, and a large sibling tool family, three sentences are insufficient. The definition leaves an agent unable to safely invoke it or understand what a call to this stub-like tool actually returns.

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 declares zero named properties but allows arbitrary additional properties, so this is an open parameter bag rather than a truly parameterless tool. The description names none of the likely required arguments such as sellerId, SKU, marketplaceIds, or the item body, adding no parameter-level meaning beyond 'for a selling partner.'

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 specific verb-resource pair: it 'creates a new or fully-updates an existing listings item,' which clearly identifies the operation's purpose. It does not explicitly distinguish itself from sibling operations such as ListingsItems_putListingsItem or the patch/delete variants, and the opening 'Catalog entry' is vague.

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?

There is no explicit when-to-use or when-not-to-use guidance and no named alternative tool. 'Fully-updates' implies a contrast with partial updates, and 'Runs in your Kuudo deployment, not here' is an environment constraint, but the description does not help an agent choose between this and the many closely related siblings.

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