mail_createForwarderV1

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

Discloses key behavioral aspects: destination gets confirmation email, forwarding only active after confirmation. Without annotations, this is good transparency, though missing details like whether existing forwarders are affected.

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 sentences, no fluff, critical information front-loaded. Highly efficient.

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?

Covers purpose, creation behavior, and activation requirement. For a tool with no output schema, this is nearly complete. Lacks details on error scenarios or what happens if destination is invalid.

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 coverage is 100%, description adds no new information beyond the parameter names and existing descriptions. Baseline 3 is appropriate.

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?

Clearly states action (create), resource (forwarder from mailbox to destination), and includes confirmation process. Distinguishes from sibling tools like list/delete/forwarder.

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?

Implies usage context for creating forwarders but does not explicitly contrast with alternatives like mail_createAliasV1 or mail_createCatchAllV1. No when-not-to-use guidance.

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