petstore-api.updateUser

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

The description adds no behavioral information beyond what the annotations already declare. It does not clarify whether the update is a full replacement or partial patch, what data may be overwritten, or what side effects or errors might occur, so the description itself contributes little 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 short sentence with no wasted words, but it is under-specified rather than usefully concise. Because the wording largely repeats the tool name, the sentence does not earn much additional value.

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 mutation tool with an empty input schema, the description leaves critical operational context missing: the agent is not told how to identify the target user, what an update entails, or whether the update is partial or full. Having an output schema does not compensate for the lack of invocation guidance and update semantics.

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 parameters in the input schema, so there are no parameter semantics for the description to clarify. Per the rubric, 0 parameters receives a baseline of 4, and no schema-documented parameters are left unexplained.

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 is essentially a verbatim restatement of the tool name: 'updateUser' becomes 'Update user resource.' It states the general action and target but adds no specificity about which user, by what identifier, or what aspects are updatable, so it falls into the tautology category.

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 usage context is provided. The description does not say when to use updateUser versus createUser, deleteUser, updatePet, or the duplicate swagger-petstore updateUser, nor does it mention prerequisites such as the user already existing.

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