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

Annotations only say it is not read-only, can reach open-world endpoints, and is not destructive. The description adds what actually happens: exactly one event, of type webhook.test, cryptographically signed, sent immediately, to the configured endpoint, then the endpoint's response is reported. It also adds an auth requirement. It stops short of describing side effects on the webhook record itself, such as failure state, so it falls short of a 5.

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?

Two sentences with zero filler; the action and its verification purpose come first, and the permission requirement follows as the second essential fact.

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 annotations and an output schema for the reported response, the description covers what an agent needs: what is sent, to where, and what authorization is required. It omits whether failed tests affect the webhook's stored state or whether repeat calls are rate-limited.

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 has 100% description coverage for both parameters, including a detailed explanation of the workspaceId. The description adds nothing about the id parameter or workspace scope, 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?

States a specific verb (send) and resource (a signed webhook.test event) plus its purpose (verify the URL and signature check). It is clearly distinguishable from list_webhooks, get_webhook, update_webhook, and delete_webhook without opening any schema.

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 description gives a clear condition for use ('to check the URL and the signature check work') and states the prerequisite permission (webhooks.manage). It does not name an alternative or say when not to use it, but no sibling performs a comparable test call.

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