fizzy_test_webhook · Fizzy Do MCP: Risk & Policy

WHAT IT DOES

What fizzy_test_webhook does on Fizzy Do MCP

AI agents invoke fizzy_test_webhook to trigger actions in Fizzy Do MCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why fizzy_test_webhook needs a policy

This tool triggers an external HTTP request to a webhook endpoint, which is an external operation with side effects. It doesn't create or modify stored data in a reversible way (Write), nor does it delete anything (Destructive). The action is 'sending a test delivery' — executing an outbound call to an external system. Misuse could spam external endpoints or expose webhook URLs, hence medium severity.

From the tool's definition Send a test delivery to a webhook to verify it is configured correctly

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

fizzy_test_webhook Rate-limited

fizzy_test_webhook stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "fizzy_test_webhook": {
      "limits": [
        {
          "counter": "fizzy_test_webhook_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about fizzy_test_webhook

What does the fizzy_test_webhook tool do? +

Send a test delivery to a webhook to verify it is configured correctly. Requires admin privileges. It is categorised as a Execute tool in the Fizzy Do MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on fizzy_test_webhook? +

Register the Fizzy Do MCP server in PolicyLayer and add a rule for fizzy_test_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 Fizzy Do MCP. Nothing to install.

What risk level is fizzy_test_webhook? +

fizzy_test_webhook is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit fizzy_test_webhook? +

Yes. Add a rate_limit block to the fizzy_test_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 fizzy_test_webhook completely? +

Set action: deny in the PolicyLayer policy for fizzy_test_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 fizzy_test_webhook? +

fizzy_test_webhook is provided by the Fizzy Do MCP server (ryanyogan/fizzy-do-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.