getapi_validation_email_disposable

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

With no annotations, the description carries the full behavioral burden and discloses almost nothing beyond the endpoint path. It does not state whether this is a read-only lookup, what it returns (boolean, score, domain list), or any auth/rate-limit behavior.

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?

A single front-loaded line with no wasted words, but it is terse to the point of under-specification; the bracketed endpoint is the only additional detail.

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?

No output schema, no annotations, and a nested request object wrapper left unexplained. An agent cannot tell what the response contains or how to interpret a 'disposable' result, which is core to calling this correctly.

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 single nested body.email parameter has 0% schema description coverage, and the description supplies no format, example, or constraint guidance. 'Disposable email domain checker' only loosely implies the input is an email address.

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?

States a specific resource and function: checking whether an email domain is disposable, plus the HTTP endpoint. The 'disposable' qualifier partially distinguishes it from siblings like getapi_validation_email and getapi_validation_email_batch, though it never names them.

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 choose this over the closely-named general email validator or the batch variant. The purpose implies a use case, but the description offers no conditions, prerequisites, or alternatives.

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