panelica_domains_get_v1_domains_id_email_deliverability

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

Annotations already declare the operation read-only, idempotent, and non-destructive. The description adds the required 'domains:read' scope and the HTTP method/path, which is useful context beyond annotations, but it does not describe the response shape or any other behavioral nuances. No contradiction exists.

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 short, front-loaded with the summary, and includes the endpoint, category, scope, and read-only status in a compact format. Minor redundancy exists because 'Read-only' repeats the readOnlyHint annotation and the first line repeats the title, but there is no padding.

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 one-parameter read-only endpoint, the description provides enough to make the call: ID, endpoint, and required scope. However, with no output schema present, it does not explain what the deliverability list contains or how an agent should interpret the results, leaving a meaningful gap.

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 documents the only parameter, id, with 100% coverage. The description's HTTP path '/v1/domains/:id/email-deliverability' reinforces that id refers to the domain ID, which is mild additional context, but no deeper semantics are added.

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 and resource: 'List email deliverability', and the HTTP line clarifies that it operates on a domain endpoint. This distinguishes it from sibling domain tools like email autoresponders, email forwarders, SPF, and logs, though it does not define what 'email deliverability' actually includes.

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. The category, read-only flag, and required scope are stated, but the description never says when an agent should select this endpoint over related domain email or DNS tools.

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