create_webhook_endpoint

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

No annotations are provided, so the description carries the full burden. It only states the registration action and the endpoint's purpose, but does not disclose permissions, validation behavior, idempotency, or what happens on success/failure. This is a minimal behavioral disclosure for a mutation tool.

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 a single, focused sentence beginning with the action verb 'Register'. It contains no filler or redundant information, making it highly concise and easy to parse.

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 mutation tool with no annotations, no output schema, and incomplete parameter coverage, the description should explain more. It omits return value, permissions, behavior for duplicate endpoints, and the optional 'description' parameter, leaving the agent under-informed about the full scope of the operation.

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 describes 'url' with 'must be https://', which the description reinforces but does not add much beyond that. The optional 'description' parameter has no schema description and the tool description does not explain it. With 50% schema coverage, the description partially compensates by providing webhook context, but not fully.

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 'Register' with a clear resource 'https webhook endpoint' and states its purpose 'to deliver monitor matches to.' This distinguishes it from sibling tools like create_monitor and list_webhook_endpoints.

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 phrase 'to deliver monitor matches to' provides clear context for when this tool should be used, implying it is for setting up delivery of monitor results. It does not explicitly mention exclusions or alternatives, but the context is sufficient for basic selection.

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