qr_generate · Agent Toolbox MCP: Risk & Policy

WHAT IT DOES

What qr_generate does on Agent Toolbox

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

WHY IT NEEDS A POLICY

Why qr_generate needs a policy

An AI agent can call qr_generate faster than any human can review — one bad instruction and it creates or modifies resources in Agent Toolbox by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

qr_generate Rate-limited

qr_generate 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_generate": {
      "limits": [
        {
          "counter": "qr_generate_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 Agent Toolbox, so you can run agents against it safely.

FAQ

Questions about qr_generate

What does the qr_generate tool do? +

Generate a QR code (PNG base64 or SVG). It is categorised as a Write tool in the Agent Toolbox 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_generate? +

Register the Agent Toolbox MCP server in PolicyLayer and add a rule for qr_generate: 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 Agent Toolbox. Nothing to install.

What risk level is qr_generate? +

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

Can I rate-limit qr_generate? +

Yes. Add a rate_limit block to the qr_generate 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_generate completely? +

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

qr_generate is provided by the Agent Toolbox MCP server (vincentwei1021/agent-toolbox). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.