generate_static_qrcode

THE RISK

Medium Risk

Why generate_static_qrcode needs a policy

This tool creates a reusable payment QR code artifact. While it does not directly move money, it generates a financial instrument (a payment QR code) that enables financial transactions. It falls under Write as it creates a persistent/reusable artifact, but the financial facilitation aspect is notable.

From the tool's definition Generate a static PicPay Pay QR code for in-store / reusable use. Returns the QR content and a base64 image.

Documented attack patterns abuse exactly the kind of access generate_static_qrcode gives an agent:

POLICY

How to control generate_static_qrcode

PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Afip, and nothing reaches the server without passing your rules. This is the rule we recommend for generate_static_qrcode:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "generate_static_qrcode": {
      "limits": [
        {
          "counter": "generate_static_qrcode_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

generate_static_qrcode 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.

Create a free account and register Mcp Afip — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

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EXPLORE

Related tools and policies

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about generate_static_qrcode

What does the generate_static_qrcode tool do? +

Generate a static PicPay Pay QR code for in-store / reusable use. The buyer opens PicPay, scans the QR and types in the amount. Returns the QR content and a base64 image. It is categorised as a Write tool in the Mcp Afip MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on generate_static_qrcode? +

Register the Mcp Afip MCP server in PolicyLayer and add a rule for generate_static_qrcode: 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 Mcp Afip. Nothing to install.

What risk level is generate_static_qrcode? +

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

Can I rate-limit generate_static_qrcode? +

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

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

generate_static_qrcode is provided by the Mcp Afip MCP server (codespar/mcp-dev-latam). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mcp Afip tool call.

Start from Mcp Afip, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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