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zebbern

Webhook.site MCP Server

by zebbern

get_webhook_email

Retrieve the unique email address for a webhook token to capture incoming emails. Optionally validate the token's existence.

Instructions

Get the unique email address for a webhook token. Any emails sent to this address will be captured by the webhook. Optionally validate that the token exists.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
validateNoIf true, verify the token exists via API call before returning email
webhook_tokenYesThe webhook token (UUID) from webhook.site
Behavior3/5

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

No annotations provided, so description carries full burden. It discloses the optional validation but lacks details on error handling, rate limits, or auth requirements. Adequate but minimal.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two sentences, front-loaded with purpose, additional context in second. No unnecessary words, highly efficient.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

No output schema, so description should hint at return value (e.g., email string). It does not mention return type, error behavior, or prerequisites. Lacks some completeness for a simple but useful tool.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Input schema covers all parameters with descriptions (100%). The description adds context: explains the purpose of the return email and the optional validation behavior, enhancing understanding beyond schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states it retrieves a unique email address for a webhook token, explaining the purpose and behavior. It differentiates from siblings like get_webhook_url by focusing on email functionality.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this tool vs alternatives (e.g., other getters or webhook tools). Does not specify prerequisites or when validation is necessary.

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

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