sys_domainname

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

With no annotations, the description carries the behavioral transparency burden. It explicitly notes that this is a write operation and requires confirmation, which is valuable and beyond the schema. Still, it does not disclose what changes are applied, whether the operation is reversible, or what confirmation workflow is expected.

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, front-loaded sentence with no wasted words. It is efficient and easy to parse. However, it is so terse that it leaves key behavioral and confirmation details unmentioned, slightly reducing the benefit of its brevity.

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?

Given no annotations, no output schema, and 0% schema description coverage, the description is too thin to fully support correct invocation. It states the core purpose but omits how the confirmation mechanism works, what user_code is for, and what result or confirmation data the agent should expect in return.

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 0%, so the description must compensate. It clarifies only the 'domain' parameter by naming it as the router domain name site. The 'requires confirmation' phrase loosely relates to confirm_token and confirmation_id, but user_code remains completely unexplained. The description does not sufficiently cover all parameters.

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 specific action and resource: 'Set router domain name'. It is unambiguous and identifies the primary function. However, it does not distinguish this tool from the closely related sibling sys_name, which likely handles a different naming concept.

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 gives clear context for what the tool does but does not state when to choose it over alternatives or when not to use it. The parenthetical 'requires confirmation' hints at a workflow prerequisite, but it does not provide explicit routing guidance or exclusions.

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