generate_qr_code · QR Code Generator MCP: Risk & Policy

WHAT IT DOES

What generate_qr_code does on QR Code Generator MCP

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

WHY IT NEEDS A POLICY

Why generate_qr_code needs a policy

This tool generates QR codes on demand without modifying existing data or performing destructive operations. While it creates output (SVG image data), the creation is reversible, non-destructive, and does not execute arbitrary code, move financial resources, or delete anything. It fits the Write category: creates or modifies data reversibly.

From the tool's definition Tool 'generate_qr_code' creates and returns base64-encoded SVG image data. The description explicitly states it 'Generate[s] a QR code' and returns data that 'can be saved or displayed', indicating reversible creation of new digital artifacts.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_qr_code Rate-limited

generate_qr_code 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": {
    "generate_qr_code": {
      "limits": [
        {
          "counter": "generate_qr_code_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 QR Code Generator MCP, so you can run agents against it safely.

FAQ

Questions about generate_qr_code

What does the generate_qr_code tool do? +

Generate a QR code with custom styling. Returns base64-encoded SVG image data that can be saved or displayed. Supports multiple visual styles. It is categorised as a Write tool in the QR Code Generator MCP 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_qr_code? +

Register the QR Code Generator MCP server in PolicyLayer and add a rule for generate_qr_code: 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 QR Code Generator MCP. Nothing to install.

What risk level is generate_qr_code? +

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

Can I rate-limit generate_qr_code? +

Yes. Add a rate_limit block to the generate_qr_code 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_qr_code completely? +

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

generate_qr_code is provided by the QR Code Generator MCP server (kalypsokichu-code/qr-tool-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.