register_new_user

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

With no annotations, the description carries the full burden of disclosing behavioral traits. It only states the action 'Register' without mentioning side effects, error handling, or whether the user will be automatically logged in. This lack of behavioral context is a significant gap.

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, compact sentence of only 9 words with no filler or redundant content. It is efficiently structured and front-loaded with the core purpose, though it could be expanded without sacrificing conciseness.

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?

This tool has 13 required parameters, no output schema, and no annotations, making the description the only contextual source. The description is too minimal to cover the complexity; it does not mention prerequisites, expected outcomes, or how it fits into the registration workflow alongside sibling tools.

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?

All 13 parameters have schema descriptions (100% coverage), so the description does not need to add parameter information. The description itself adds no extra semantic detail beyond what the schema already provides, aligning with the baseline of 3 for high schema coverage.

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 verb 'Register' and the resource 'new user account' on 'AutomationExercise', making it immediately distinguishable from sibling tools like login_user and logout_user. It is specific and unambiguous about what the tool does.

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 navigating to the site first or logging in. It also does not mention prerequisites or conditions like whether the user already exists. This is similar to the MID example that scored 2 for lacking when-to-use guidance.

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