create_domain

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

With no annotations, the description carries full behavioral burden, but it only says 'Add a domain to a service.' It does not disclose side effects, whether HTTPS/certificate provisioning happens, validation rules, or whether the operation is reversible. This is a mutation tool and should reveal more.

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 with no filler or repetition. Every word contributes to identifying the action and resource, which is ideal for this simple tool.

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?

The schema fully documents parameters and required fields, making basic invocation possible. However, with no annotations and no output schema, the description should state prerequisites and consequences more explicitly, such as whether the service must already exist and what happens when the domain is added.

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 100%, so all five parameters are documented in the schema. The description itself adds no semantic detail beyond 'domain' and 'service', so the baseline 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 clear action (add) and target resource (a domain to a service), which is enough to distinguish create_domain from sibling tools like list_domains and delete_domain. The verb and object are specific rather than tautological.

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 about when to choose this tool over alternatives, no prerequisites, and no mention of list_domains/delete_domain for other domain operations. The only usage signal is implied by the word 'add'.

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