create_user

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

Annotations already indicate a write operation (readOnlyHint: false) and that it is not destructive. However, the description adds no behavioral context beyond that, such as whether the user is created with no privileges, error handling for existing users, or authentication requirements.

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, concise sentence that is front-loaded and directly conveys the core purpose. However, it is extremely sparse and could convey more useful context without becoming verbose, so it does not earn a 5.

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 tool is simple with few parameters and an output schema absent. The description plus schema is adequate for a basic understanding, but it falls short by not mentioning crucial contextual details like the user being created without privileges or any prerequisites, which is important given the sibling tools for privileges exist.

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% for both parameters (username and password), so the schema already documents their meaning. The description adds no additional parameter insight, but it does not need to compensate since the schema is complete.

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 action: 'create a database user that can log in'. It uses a specific verb and resource, and it is distinguishable from sibling tools like grant_privilege or list_users. No ambiguity exists.

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?

The description provides no guidance on when to use this tool versus alternatives, such as whether privileges need to be granted separately or if prerequisites exist. It simply states the action without context.

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