siigo_update_webhook · Siigo MCP Server MCP: Risk & Policy

WHAT IT DOES

What siigo_update_webhook does on Siigo MCP Server

AI agents use siigo_update_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_update_webhook needs a policy

This tool modifies webhook subscription settings, which is a reversible write operation. While webhooks control event notifications and could potentially trigger downstream effects if misconfigured, the tool itself is not directly executing external operations, deleting data, or moving money. The impact is confined to updating notification preferences/endpoints.

From the tool's definition Tool name 'siigo_update_webhook' combined with description 'Update an existing webhook subscription' indicates modification of webhook configuration data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

siigo_update_webhook Rate-limited

siigo_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": {
    "siigo_update_webhook": {
      "limits": [
        {
          "counter": "siigo_update_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_update_webhook

What does the siigo_update_webhook tool do? +

Update an existing webhook subscription. 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_update_webhook? +

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

What risk level is siigo_update_webhook? +

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

Can I rate-limit siigo_update_webhook? +

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

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

siigo_update_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.