mail_domain_get

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

Without annotations, the description must carry behavioral disclosure. The verb 'Get' clearly signals a non-mutating read operation, which is useful, but the description does not mention return format, error behavior if the domain ID is not found, or authentication requirements. Adequate for a simple getter but not rich.

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?

One sentence of seven words, verb first, with no filler. Every word earns its place and the key scoping detail ('by ID') is front-loaded.

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 single-parameter getter with no nested objects, the description is largely complete: an agent can call it with a domain_id. The absence of an output schema leaves the return shape undocumented, but the tool's purpose makes the result predictable. Minor gap around handling unknown IDs.

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 already defines domain_id with a description at 100% coverage. The description's 'by ID' reinforces the parameter's role but adds no new semantic information beyond what the schema provides, 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?

The description states a specific action ('Get') and resource ('mail domain') with a clear scope ('by ID'). It distinguishes from mail_domain_list (which lists domains) and from add/delete operations, though it doesn't explicitly name alternatives.

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 guidance is given on when to use this tool versus alternatives such as mail_domain_list, nor are prerequisites mentioned (e.g., needing a domain_id from a list call). Usage is only implied by the verb and the parameter.

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