scf_create_webhook · Scf MCP: Risk & Policy

WHAT IT DOES

What scf_create_webhook does on Scf

AI agents use scf_create_webhook to create or update resources in Scf — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Scf environment.

WHY IT NEEDS A POLICY

Why scf_create_webhook needs a policy

This tool creates a new webhook endpoint and generates a cryptographic secret, which is a reversible write operation (the webhook can be deleted or reconfigured). It is not destructive because webhook creation/modification is undoable.

From the tool's definition Tool description states 'Create a webhook endpoint' and 'write — admin role'. The verb 'create' and explicit 'write' label confirm data modification.

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

scf_create_webhook Rate-limited

scf_create_webhook stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "scf_create_webhook": {
      "limits": [
        {
          "counter": "scf_create_webhook_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Scf, so you can run agents against it safely.

FAQ

Questions about scf_create_webhook

What does the scf_create_webhook tool do? +

Create a webhook endpoint for evidence-inbox ingestion (write — admin role). Returns the plaintext HMAC signing secret exactly once — store it immediately; it cannot be retrieved later. It is categorised as a Write tool in the Scf MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on scf_create_webhook? +

Register the Scf MCP server in PolicyLayer and add a rule for scf_create_webhook: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Scf. Nothing to install.

What risk level is scf_create_webhook? +

scf_create_webhook is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit scf_create_webhook? +

Yes. Add a rate_limit block to the scf_create_webhook rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block scf_create_webhook completely? +

Set action: deny in the PolicyLayer policy for scf_create_webhook. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides scf_create_webhook? +

scf_create_webhook is provided by the Scf MCP server (mcp-server-scf). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.