einvoice_generate_zugferd · Einvoice MCP: Risk & Policy

WHAT IT DOES

What einvoice_generate_zugferd does on Einvoice

AI agents use einvoice_generate_zugferd 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_zugferd needs a policy

This tool creates (generates) new electronic invoice documents in ZUGFeRD 2.x format. Generation of invoices is a Write operation—it creates reversible data structures. While the description field is empty, the tool name and server context clearly indicate invoice generation.

From the tool's definition Tool name 'einvoice_generate_zugferd' indicates generation of ZUGFeRD invoices. The server description confirms it handles 'generate' operations for electronic invoices per EN 16931 standard. ZUGFeRD generation creates new invoice documents.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

einvoice_generate_zugferd Rate-limited

einvoice_generate_zugferd 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_zugferd": {
      "limits": [
        {
          "counter": "einvoice_generate_zugferd_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_zugferd

What does the einvoice_generate_zugferd tool do? +

einvoice_generate_zugferd. 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_zugferd? +

Register the Einvoice MCP server in PolicyLayer and add a rule for einvoice_generate_zugferd: 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_zugferd? +

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

Can I rate-limit einvoice_generate_zugferd? +

Yes. Add a rate_limit block to the einvoice_generate_zugferd 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_zugferd completely? +

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

einvoice_generate_zugferd 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.