contact-template · MCP QR Code Server MCP: Risk & Policy

WHAT IT DOES

What contact-template does on MCP QR Code Server

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

WHY IT NEEDS A POLICY

Why contact-template needs a policy

This tool creates new data (a QR code) that encodes contact information. It is Write because it generates/creates data with reversible effects - the QR code can be discarded or regenerated without side effects. It is not Read (no mere retrieval), not Execute (no command/code execution), not Destructive (nothing is deleted), not Financial (no money movement), and not Other.

From the tool's definition The tool generates and creates a QR code containing contact information in vCard format. The name 'contact-template' and description 'Generate a QR code' indicate creation of data output (a QR code artifact) that encodes contact information.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

contact-template Rate-limited

contact-template 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": {
    "contact-template": {
      "limits": [
        {
          "counter": "contact-template_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 MCP QR Code Server, so you can run agents against it safely.

FAQ

Questions about contact-template

What does the contact-template tool do? +

Generate a QR code containing contact information in vCard format. It is categorised as a Write tool in the MCP QR Code Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on contact-template? +

Register the MCP QR Code Server MCP server in PolicyLayer and add a rule for contact-template: 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 QR Code Server. Nothing to install.

What risk level is contact-template? +

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

Can I rate-limit contact-template? +

Yes. Add a rate_limit block to the contact-template 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 contact-template completely? +

Set action: deny in the PolicyLayer policy for contact-template. 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 contact-template? +

contact-template is provided by the MCP QR Code Server MCP server (jwalsh/mcp-server-qrcode). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.