create_user

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

With no annotations, the description carries full burden for behavioral disclosure. It does not mention side effects (e.g., user creation, potential conflicts with existing users), authentication requirements, or response behavior. The agent receives no insight into what happens when the tool is invoked.

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 extremely brief (3 words) but not effectively concise—it omits essential information that should be front-loaded. Important details about the input schema, password constraints, and multiplicity are missing. The brevity hinders rather than helps understanding.

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?

Given the complexity of the input schema (nested array, required fields, password pattern) and lack of output schema, the description is severely incomplete. It does not explain that the tool creates one or more users, highlight the password rules, or indicate what the response contains. This leaves the agent poorly equipped to use the tool correctly.

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%, so the schema already documents all parameters. The description adds no extra meaning beyond the schema, such as usage hints, defaults, or relationships between fields. Following the baseline rule for high coverage, a score of 3 is appropriate.

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 'Create user instance' restates the tool name without adding specificity. It identifies the action and resource but lacks details about what creating a user entails, such as the required fields or that it can create multiple users at once. It is not misleading but fails to provide additional clarity beyond the name.

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 on when to use this tool versus alternatives like 'update_user', 'delete_user', or 'get_user'. The description does not mention prerequisites, restrictions, or typical use cases. This omission leaves the agent without context to choose the correct tool among siblings.

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