verify_domain_status

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

Annotations already declare readOnlyHint=true and idempotentHint=true, so the safety profile is covered. The description adds specific return semantics (verification and DKIM status), which is useful and not redundant. It doesn't mention rate limits or auth, but for a read-only status check this is acceptable.

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 two sentences with zero filler. It front-loads the primary action and result, and every clause adds value. No redundant phrasing or restatement of the tool name.

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 simple read-only tool with one parameter, a detailed schema, and an output schema present, the description fully covers what an agent needs to know: what it does and what it returns. No critical operational details are missing.

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 description for the single parameter 'domain' is comprehensive (includes format, example, and per-region note), and schema coverage is 100%. The tool description adds no additional meaning beyond what the schema already provides, so the baseline 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 clear verb ('Check') and identifies the exact resource ('verification and DKIM status of a sending domain in your AWS SES account'). It also specifies what is returned (verification and DKIM configuration status), making it distinct from all sibling tools, none of which target domain verification.

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 purpose is clear enough that an agent would know when to call it, but the description provides no explicit guidance on when to prefer this over get_setup_status, which could plausibly overlap. It neither states when not to use it nor names any alternatives, so the usage context is only implied.

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