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zebbern

Webhook.site MCP Server

by zebbern

update_webhook

Modify webhook settings such as response content, status code, timeout, and CORS headers to control HTTP response behavior.

Instructions

Update webhook settings (response content, status code, timeout, CORS).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
corsNoEnable CORS headers for cross-domain requests
timeoutNoSeconds to wait before returning response (0-30)
webhook_tokenYesThe webhook token (UUID) from webhook.site
default_statusNoDefault HTTP response status code (200-599)
default_contentNoDefault response content/body
default_content_typeNoDefault response Content-Type header
Behavior2/5

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

No annotations provided, so description carries full burden. It states 'update' but doesn't disclose behavioral traits: idempotency, partial vs full overwrite, authorization needs, response behavior, or side effects. Agent cannot reliably infer consequences.

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

Conciseness4/5

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

Single sentence with no fluff. Front-loaded with key information. However, it may be too concise at the expense of completeness.

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

Completeness2/5

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

Given 6 parameters, no output schema, and no annotations, the description is insufficient. It doesn't explain update behavior (e.g., partial vs full), success signal, or error conditions. Agent lacks complete context to use the tool correctly.

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

Parameters3/5

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

Schema description coverage is 100%, so each parameter has a description. The tool description mentions a subset of parameters (response content, status code, timeout, CORS) but adds no additional meaning beyond the schema. Baseline of 3 is appropriate.

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

Purpose4/5

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

Description clearly states verb 'update' and resource 'webhook', listing the settings that can be modified: response content, status code, timeout, CORS. The purpose is specific and aligns with the tool name, distinguishing it from creation tools, though sibling differentiation is only implicit.

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 versus alternatives like create_webhook or delete_webhook. No prerequisites mentioned (e.g., webhook must exist). The description lacks context for appropriate invocation.

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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