einvoice_generate_xrechnung · Einvoice MCP: Risk & Policy

WHAT IT DOES

What einvoice_generate_xrechnung does on Einvoice

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

WHY IT NEEDS A POLICY

Why einvoice_generate_xrechnung needs a policy

This tool creates/generates electronic invoice documents (XRechnung format), which are financial records. Generation of invoices creates new data artifacts that have legal and financial implications in the German e-invoicing system. This is a Write operation rather than Execute because it generates structured documents rather than executing arbitrary code.

From the tool's definition Tool name 'einvoice_generate_xrechnung' indicates generation of XRechnung 3.0 compliant invoices. Server description states the tool enables 'generate' operations for electronic invoices.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

einvoice_generate_xrechnung Rate-limited

einvoice_generate_xrechnung 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": {
    "einvoice_generate_xrechnung": {
      "limits": [
        {
          "counter": "einvoice_generate_xrechnung_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 Einvoice, so you can run agents against it safely.

FAQ

Questions about einvoice_generate_xrechnung

What does the einvoice_generate_xrechnung tool do? +

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

How do I enforce a policy on einvoice_generate_xrechnung? +

Register the Einvoice MCP server in PolicyLayer and add a rule for einvoice_generate_xrechnung: 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 Einvoice. Nothing to install.

What risk level is einvoice_generate_xrechnung? +

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

Can I rate-limit einvoice_generate_xrechnung? +

Yes. Add a rate_limit block to the einvoice_generate_xrechnung 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 einvoice_generate_xrechnung completely? +

Set action: deny in the PolicyLayer policy for einvoice_generate_xrechnung. 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 einvoice_generate_xrechnung? +

einvoice_generate_xrechnung is provided by the Einvoice MCP server (mavengence/einvoice-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.