list_email_security_domains

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

With no annotations, the description carries the full burden of explaining behavior, but 'List email security domains' only restates the operation already implied by the tool name. It does not disclose side effects, authentication needs, pagination, rate limits, or what the response contains.

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 text is only four words with no wasted tokens, but it simply repeats the tool name and omits useful context, making it under-specified rather than genuinely concise. An effective description would front-load scope and sibling differentiation.

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?

With no output schema and no annotations, the description is incomplete for reliable invocation. It does not explain what an email security domain is, whether results are paginated, how account_id affections the query, or how this tool differs from closely related sibling tools.

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 already provides 100% coverage by describing account_id as 'The account ID', so the baseline is met. The tool description adds no extra meaning about how account_id scopes the list or what format the ID should take.

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 'List email security domains' is essentially a verbatim restatement of the tool name and adds no new specificity. It identifies a resource and a list operation, but it does not explain what an email security domain is, what scope it covers, or how it differs from the many sibling email security list/get tools.

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?

No usage guidance is provided. The description never states when to choose this tool over alternatives such as get_email_security_domain, list_email_security_trusted_domains, or other list_email_security_* tools, and it does not mention prerequisites beyond the schema's required account_id.

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