siigo_create_webhook · Siigo MCP Server MCP: Risk & Policy

WHAT IT DOES

What siigo_create_webhook does on Siigo MCP Server

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

WHY IT NEEDS A POLICY

Why siigo_create_webhook needs a policy

Creating a webhook creates a new configuration entry in the Siigo system that persists and can be modified or deleted later. This is a reversible Write operation (the webhook can be removed). It is not Destructive because webhooks can be unsubscribed. It is not Execute because the tool itself does not run code or trigger external actions—it merely registers a subscription.

From the tool's definition Tool name 'siigo_create_webhook' and description 'Subscribe to a webhook event' indicate creation of a new webhook subscription, which modifies system configuration by establishing a new event listener.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

siigo_create_webhook Rate-limited

siigo_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": {
    "siigo_create_webhook": {
      "limits": [
        {
          "counter": "siigo_create_webhook_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

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

FAQ

Questions about siigo_create_webhook

What does the siigo_create_webhook tool do? +

Subscribe to a webhook event. It is categorised as a Write tool in the Siigo MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on siigo_create_webhook? +

Register the Siigo MCP Server MCP server in PolicyLayer and add a rule for siigo_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 Siigo MCP Server. Nothing to install.

What risk level is siigo_create_webhook? +

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

Can I rate-limit siigo_create_webhook? +

Yes. Add a rate_limit block to the siigo_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 siigo_create_webhook completely? +

Set action: deny in the PolicyLayer policy for siigo_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 siigo_create_webhook? +

siigo_create_webhook is provided by the Siigo MCP Server MCP server (jdlar1/siigo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.