signup-user

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

There are no annotations provided, so the description carries the full burden. It only states the action ('Register a new user account') without disclosing side effects, authentication requirements, whether it returns a token, or if the operation is idempotent. This is a significant gap for a signup tool.

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 11-word sentence that is front-loaded with the primary action and only adds essential information about required fields. It is concise with no wasted words.

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 description is minimal for a tool with 4 parameters, including an 'additionalFields' nested object whose purpose is not explained. With no annotations or output schema, the description fails to clarify the context of registration (e.g., what happens on success, whether email is optional, or how additionalFields behaves). It covers only the bare basics.

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 schema describes all parameters with 100% coverage, so the baseline is 3. The description's mention of required username/password merely repeats what the schema already indicates in the 'required' list, adding no extra semantic value beyond what the schema provides.

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 uses a specific verb ('Register') and resource ('user account'), clearly distinguishing it from sibling tools like login-user, update-user, or create-object. It also states the required credentials, reinforcing the purpose.

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. With many user-related sibling tools (e.g., login-user, update-user, delete-user), it would be helpful to mention that this is for new account creation, not for existing users or other user operations.

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