domains_update_nameservers

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

The only annotation is idempotentHint: true, which is not contradicted by the description. However, the description adds no behavioral context beyond the annotation, such as whether the operation replaces all existing nameservers or merges with the current list, any validation rules, or propagation delays. The agent is left guessing about the effect of the update.

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 redundant or filler text. It immediately communicates the core action and resource, demonstrating flawless conciseness for a tool with this simple signature.

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?

Despite having a fully documented schema and an output schema, the description lacks essential context for a mutation tool: it does not clarify whether the provided nameservers replace the existing set or are appended, nor does it mention any side effects or requirements. Given that an agent may need to decide between this and related tools like domains_get_nameservers, the description is insufficiently 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 schema already provides descriptions for both parameters (domain and nameservers) with 100% coverage. The description's phrase 'for a domain' adds minimal extra meaning, so the baseline of 3 applies as the schema carries the parameter documentation burden.

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 ('Update') with a clear resource ('nameservers for a domain'), immediately distinguishing it from read-only siblings like domains_get_nameservers and other mutation tools like dns_edit. This is a precise and unambiguous statement of the tool's function.

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 such as dns_edit or domains_add_url_forward. It lacks any mention of prerequisites, exclusions, or a preferred workflow, leaving the agent to infer appropriate usage from the name alone.

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