Create Subdomain

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

With no annotations, the description carries the full burden of behavioral disclosure. It merely says 'Create a subdomain' and provides no information about side effects (e.g., whether DNS records are automatically updated), idempotency, uniqueness constraints, or required permissions. This is functionally a tautology of the tool name.

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 extremely concise (four words) with no filler, but it simply restates the title without adding new information. While brevity is positive, this sentence does not 'earn its place' by contributing additional context or clarification.

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 create tool with no annotations, no output schema, and no behavioral explanations, the description is incomplete. It does not explain what creating a subdomain entails (e.g., whether it provisions a directory, updates DNS, or has naming constraints) or how it integrates with related hosting tools. The schema covers only parameter meanings, not the operational context.

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 covers all three parameters with descriptions (domain, username, subdomain prefix), achieving 100% coverage. The tool description adds no additional parameter semantics, so the baseline of 3 is appropriate; the schema already provides the necessary meaning.

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 the verb and resource clearly ('Create a subdomain'), which distinguishes it from sibling tools like hosting_subdomains_list and hosting_subdomains_delete. However, it lacks any scope detail (e.g., which domain or hosting account), so it is not as strong as descriptions that explicitly scope the operation.

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?

There is no guidance on when to use this tool versus alternatives. It does not mention prerequisites (e.g., the domain must exist), relationship to hosting_subdomains_list/delete, or any conditions under which subdomain creation would be inappropriate.

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