mail_createMailboxV1

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

No annotations provided, and the description only covers basic function. Does not disclose behaviors such as duplicates, order existence requirement, or password validation beyond schema description, which is insufficient for a creation 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?

Two concise sentences with no wasted words. Front-loaded with action and follows with key composition detail.

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?

Complete for a simple creation tool but lacks return value description or side effects. No output schema, so agent lacks context on expected result.

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 covers all parameters with descriptions. Description adds context that domain comes from the order, but overall adds little beyond schema. Baseline 3 applies due to 100% 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?

Description clearly states 'Create a mailbox' and explains the address composition from local part and domain, distinguishing it from sibling tools like alias, forwarder, and catch-all 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?

No explicit guidance on when to use this tool versus alternatives like mail_createAliasV1 or mail_createCatchAllV1. Implies usage for new mailboxes but lacks prerequisites or context.

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