Create Autoreply

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

With no annotations, the description carries the full burden of disclosing behavior. It only says 'Create an autoreply,' with no mention of side effects, permissions, idempotency, or return values. This is minimal disclosure and leaves the agent unaware of important operational details.

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 sentence with no filler, making it concise and front-loaded. However, it is so terse that it lacks any structural elements or explanatory context, though it avoids unnecessary verbosity.

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 simple three-parameter tool, the description is under-specified. It does not explain what an autoreply is, when it is sent, or how this operation fits into the broader mail management context. Without annotations or an output schema, the description should provide more contextual information to be complete.

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 input schema has 100% coverage with descriptions for all three parameters (body, subject, mailbox_id). The description itself adds no additional semantic meaning beyond what the schema provides, so the baseline score of 3 applies.

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 verb 'Create' and the resource 'autoreply,' which distinguishes it from sibling tools like mail_autoreplies_update and mail_autoreplies_delete. However, it does not add context about what an autoreply is or that it is tied to a mailbox, which is implied by the tool name.

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 no guidance on when to use this tool versus alternatives. Sibling tools include mail_autoreplies_update and mail_autoreplies_delete, but there is no mention of prerequisites, such as the need for an existing mailbox or whether this replaces an existing autoreply.

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