aliasmail_create_inbox

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

With no annotations, the description does carry real weight and does disclose several traits: zero-log operation, no registration, and immediate readiness. It omits key behaviors such as inbox lifetime/expiry, whether the handle must be unique or what happens on conflict, and what address is returned, which matter for a mutation/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?

Three short, front-loaded sentences with zero filler; the core action leads and the supporting conditions follow.

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 zero-required-parameter creation tool with full schema coverage and no output schema, the description is nearly sufficient. The main omission is inbox lifetime and what identifier the caller receives, which the agent would need to chain into the wait/get tools.

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 description coverage is 100% and the single optional 'handle' parameter is fully documented with examples in the schema. The description adds no additional semantics about the handle (e.g. uniqueness rules), so the baseline 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?

States a specific verb and resource ('Generate an instant ... disposable temporary email inbox') plus the service context and URL. It is unmistakably a creation tool, clearly distinguished from the sibling read/wait/check tools that operate on existing inboxes.

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 names use cases ('receive verification emails, OTP codes, or test messages') and the no-registration condition, which implies when to reach for it. However, it never explicitly routes the agent to a sibling (e.g. use wait_for_code after creation) nor states when this tool is not appropriate.

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