reset_qr_token · IIITH Mess MCP Server MCP: Risk & Policy

WHAT IT DOES

What reset_qr_token does on IIITH Mess MCP Server

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

WHY IT NEEDS A POLICY

Why reset_qr_token needs a policy

Resetting a QR token modifies/invalidates the existing token and generates a new one. This is a reversible write operation (new token can be reset again), but misuse could temporarily disrupt a student's ability to verify meals at the mess. No data is deleted permanently and no financial transaction occurs.

From the tool's definition Reset your QR code token used for meal verification at the mess

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

reset_qr_token Rate-limited

reset_qr_token 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": {
    "reset_qr_token": {
      "limits": [
        {
          "counter": "reset_qr_token_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 IIITH Mess MCP Server, so you can run agents against it safely.

FAQ

Questions about reset_qr_token

What does the reset_qr_token tool do? +

Reset your QR code token used for meal verification at the mess. It is categorised as a Write tool in the IIITH Mess MCP 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 reset_qr_token? +

Register the IIITH Mess MCP Server MCP server in PolicyLayer and add a rule for reset_qr_token: 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 IIITH Mess MCP Server. Nothing to install.

What risk level is reset_qr_token? +

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

Can I rate-limit reset_qr_token? +

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

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

reset_qr_token is provided by the IIITH Mess MCP Server MCP server (njp6969/iiith-mess-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.