ユーザー登録

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It only states that an account is created, but does not mention duplicate username handling, whether the user is auto-logged-in, password storage, or any side effects. This is a significant gap for a mutation 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 concise, front-loaded sentence with no filler. Every word contributes to stating the action and object.

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 and parameters are fully documented, but there is no output schema or annotations. The description omits important operational context such as duplicate username errors, return values, or whether registration creates a session. Adequate but with clear gaps.

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 baseline is 3. The description mentions username and password but adds no additional meaning beyond the schema, such as uniqueness constraints or validation behavior.

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?

Description uses a specific verb ('作成します') with a clear resource ('新しいアカウント') and method ('ユーザー名とパスワードで'). It clearly distinguishes itself from sibling tools like login and memo operations as account creation.

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?

Usage is implied by '新しいアカウントを作成' and the presence of a sibling 'login' tool, but there is no explicit guidance on when to use this versus alternatives, nor any exclusions such as 'do not use for existing users'.

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