addAutoRenewal

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states the core action but does not explain side effects such as billing implications, whether the call is idempotent, or what happens if the domain is not eligible. The included API-reference link may help discovery but does not itself disclose behavior.

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 that immediately states the tool's purpose, and the API reference link is a compact addition. There is no fluff or redundant information.

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 mutation that turns on auto-renewal for a domain, the description lacks important context: whether the domain must already be registered with the account, whether this commits the user to a charge, and what the response or error behavior looks like. The presence of the API reference link mitigates this slightly, but the description alone is not complete enough for reliable tool invocation.

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 describes the only parameter as 'Domain' at 100% coverage, so the description does not need to add parameter details. The description contributes no additional semantic information about the domain parameter, 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 uses a specific verb ('Turn on') and resource ('auto-renewal for a domain'), stating exactly what the tool does. The action is unambiguous and is clearly the inverse of the sibling tool removeAutoRenewal, so an agent can distinguish it without opening the schema.

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 should be used when auto-renewal needs to be enabled for a domain, but it provides no explicit when-to-use or when-not-to-use guidance. It does not mention prerequisites such as domain ownership or contrast this with renewDomain or removeAutoRenewal.

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