vk_post_user_13df50a3da9e

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

The description notes that authentication is not required and explains parameter alias handling, but it does not disclose side effects, error behavior, or whether the operation is idempotent. It also inconsistently calls the body field 'optional' while the schema marks it required, adding confusion.

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 somewhat repetitive ('Confirm the email of a new user' and 'Confirms the email of a newly registered user') and includes generic proxy boilerplate. It could be trimmed to the essential information without losing meaning.

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 a one-parameter tool, it covers the core action, authentication, and parameter passing. But it fails to mention the return value, potential errors, or the discrepancy between 'optional body' and the required schema, making it incomplete.

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 already describes the single 'body' parameter as 'The token.' The description enhances this by explaining how to pass the JSON payload, that path/query parameters are top-level fields, and that camelCase/snake_case aliases are accepted. However, it misleadingly labels the body as optional.

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 confirms a new user's email, specifying the verb (confirm) and resource (email of new user). It also identifies the underlying endpoint POST /user/confirm, distinguishing it from other user-related post tools.

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 clear context that this tool is for confirming the email of a newly registered user. It does not explicitly mention alternatives or when not to use it, but the use case is specific enough for an agent to select it appropriately.

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