create_user

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

Annotations already declare idempotentHint=false, destructiveHint=false, readOnlyHint=false. The description adds 'Not idempotent — calling twice may create duplicates' which aligns with this. However, it does not disclose required permissions, rate limits, or what happens on creation (e.g., default values for optional fields). With annotations present, the description provides minimal added value.

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 repeats 'Create a user' three times (header, standalone sentence, and final line). The header line is useful but the duplication wastes space. It could be condensed to one clear sentence. Not concise for the amount of content.

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?

No output schema is provided, yet the description does not explain what the tool returns (e.g., created user object, ID, or confirmation). For a creation action, it would be helpful to know if the user is automatically saved or requires subsequent steps. Also, no mention of authentication or side effects. The description is incomplete for a new user creation.

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?

Schema description coverage is 100% (each property has a brief description). The tool description does not add any extra meaning beyond the schema. Since no parameters are required per the schema, a user might wonder if all fields are truly optional; the description could clarify but doesn't. Baseline 3 as schema covers the field semantics.

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 clearly states the tool creates a user ('Create a user', 'Creates a new record'). It includes a header with 'WRITE' and 'POST /users' for quick identification. However, among many sibling create tools (e.g., create_a_new_contact, create_an_account), it does not differentiate itself, so it's clear but not distinguishing.

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 on when to use this tool versus alternatives like create_a_new_contact or create_an_account. The only usage hint is 'Not idempotent — calling twice may create duplicates', which is behavioral rather than contextual. No exclusions or prerequisites mentioned.

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