Create Webhook

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

With no annotations provided, the description carries the burden of explaining behavior. It discloses the primary side effect (creating a webhook) and the event-notification behavior, but it does not describe authentication requirements, idempotency, response content, or failure behavior. This is adequate but not rich.

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 no filler. The action is front-loaded, and the second sentence efficiently explains why webhooks are useful and gives concrete event examples.

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 2-parameter create tool, the description plus full schema coverage is largely sufficient. It does not mention the return value or how to obtain the created webhook ID afterward, but that is a minor gap given the tool's simplicity and the absence of an output schema.

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?

Schema description coverage is 100%, so the baseline is 3. The description mentions receiving notifications at a specified URL and gives event examples, but the schema already documents endpoint format and the full event enum. The description adds little beyond what the schema provides.

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 states a specific verb and resource: 'Create a new webhook in Resend.' It further clarifies the purpose of a webhook (receiving notifications at a URL for events), which distinguishes it clearly from sibling tools like list-webhooks, update-webhook, and remove-webhook.

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 provides clear context for when to use the tool: when you want to create a webhook to receive notifications for specific events. It does not explicitly name alternatives or exclusions, but the create-vs-manage distinction is strongly implied by the sentence and sibling names.

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