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

Since no annotations are provided, the description must disclose behavior itself. It mentions the tool is free, grants a trial credit, and creates a 'permanent' identity, which implies a mutating, persistent operation. However, it does not cover failure modes (e.g., duplicate calls), token expiration or revocation, or the exact nature of the returned token. These gaps are significant for a first-time setup tool, though the permanent nature is stated.

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 concise, with two short paragraphs. It front-loads the core purpose, then adds a 'When to use' section with critical sequencing information, and closes with the price. Every sentence adds value, with no filler or repetition. The structure is clear and scannable.

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?

For an onboarding tool with no output schema, the description must communicate what the tool returns and how to proceed. It states that a token is returned and needed for other calls, and that an email address is provided. It does not describe the exact response format or error conditions, but given its role as the first call in a workflow, the essential next steps are covered. The absence of an output schema is partially compensated by mentioning the key outputs.

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 each parameter is already well-documented (wallet pattern, message constraints, signature format). The tool description adds no parameter-specific information—it only references the output token and email. Thus, it relies entirely on the schema for parameter meaning, which is adequate but not enhanced.

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 tool's function: converting a wallet address into a permanent agent identity that includes a handle, email, webhook, and API token. The verb 'Turn' and the specific outputs distinguish it from all sibling tools, none of which handle identity creation. The title 'Claim an identity' reinforces 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 explicit usage guidance: 'Call this once, before anything else.' It explains that the returned token is required for every other call and that the email address enables third-party signups. This clearly sets expectations for when to use the tool relative to all siblings, even without naming alternatives.

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