qr_code_render · Claude Imagine MCP: Risk & Policy

WHAT IT DOES

What qr_code_render does on Claude Imagine

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

WHY IT NEEDS A POLICY

Why qr_code_render needs a policy

The tool generates a QR code and displays it in the browser UI. This is a Write operation as it creates and renders new content to the interface. It has no destructive effects and does not execute arbitrary code, though it does modify the displayed UI. The blast radius is low since it only renders a visual QR code element.

From the tool's definition Generate and display a QR code

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

qr_code_render Rate-limited

qr_code_render 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": {
    "qr_code_render": {
      "limits": [
        {
          "counter": "qr_code_render_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 Claude Imagine, so you can run agents against it safely.

FAQ

Questions about qr_code_render

What does the qr_code_render tool do? +

Generate and display a QR code. It is categorised as a Write tool in the Claude Imagine MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on qr_code_render? +

Register the Claude Imagine MCP server in PolicyLayer and add a rule for qr_code_render: 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 Claude Imagine. Nothing to install.

What risk level is qr_code_render? +

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

Can I rate-limit qr_code_render? +

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

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

qr_code_render is provided by the Claude Imagine MCP server (t3rm1nu55/claudeimagine). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.