Resend catch-all confirmation

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

Annotations already indicate this is not read-only and not destructive. The description adds one useful behavioral constraint: it applies only to an unconfirmed catch-all. However, it does not address potential side effects like duplicate emails, idempotency, or behavior when the catch-all is already confirmed.

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 clear sentence with no filler. It front-loads the action and target, and every word earns its place.

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 with a fully documented schema, the description provides enough to call the tool correctly. Minor gaps remain around expected response or errors, but these are less critical given the simplicity of the operation.

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 fully documents the single parameter catchallId as 'Catch-all resource ID' (100% coverage). The description adds only contextual meaning that the catch-all is unconfirmed, not substantial new parameter semantics.

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 states a specific action (resend), a precise resource (confirmation email for a catch-all), and the target (mailbox address of an unconfirmed catch-all). This clearly distinguishes it from the similar sibling mail_resendForwarderConfirmationV1, which targets forwarder confirmations instead.

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 implies the tool is for resending confirmations to unconfirmed catch-alls, giving some usage context. However, it does not explicitly explain when to use this over the very similar forwarder confirmation tool, nor does it state what happens if the catch-all is already confirmed.

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