fizzy_update_webhook · Fizzy Do MCP: Risk & Policy

WHAT IT DOES

What fizzy_update_webhook does on Fizzy Do MCP

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

WHY IT NEEDS A POLICY

Why fizzy_update_webhook needs a policy

Webhooks are integration points that trigger external actions when events occur. Updating a webhook can redirect notifications, change event triggers, or alter downstream system behavior. While reversible (not Destructive), this is a Write operation that modifies configuration with high blast radius if misused—an AI agent could redirect webhooks to malicious endpoints or disable critical notifications.

From the tool's definition Tool name 'fizzy_update_webhook' and description 'Update an existing webhook' indicate modification of existing data. The 'admin privileges' requirement signals this affects system-level integrations.

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

fizzy_update_webhook Rate-limited

fizzy_update_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": {
    "fizzy_update_webhook": {
      "limits": [
        {
          "counter": "fizzy_update_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 Fizzy Do MCP, so you can run agents against it safely.

FAQ

Questions about fizzy_update_webhook

What does the fizzy_update_webhook tool do? +

Update an existing webhook. Requires admin privileges. It is categorised as a Write tool in the Fizzy Do MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on fizzy_update_webhook? +

Register the Fizzy Do MCP server in PolicyLayer and add a rule for fizzy_update_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_update_webhook? +

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

Can I rate-limit fizzy_update_webhook? +

Yes. Add a rate_limit block to the fizzy_update_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_update_webhook completely? +

Set action: deny in the PolicyLayer policy for fizzy_update_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_update_webhook? +

fizzy_update_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.