register_meal · IIITH Mess MCP Server MCP: Risk & Policy

WHAT IT DOES

What register_meal does on IIITH Mess MCP Server

AI agents use register_meal 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 register_meal needs a policy

The tool creates or modifies a student's meal registration state, which is reversible (can be cancelled via sibling 'cancel_meal' tool). This is a Write operation rather than Execute because it modifies structured data rather than running arbitrary code.

From the tool's definition Tool name 'register_meal' and description 'Register for a meal at a specific mess' indicate creation/modification of meal registration data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

register_meal Rate-limited

register_meal 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": {
    "register_meal": {
      "limits": [
        {
          "counter": "register_meal_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 register_meal

What does the register_meal tool do? +

Register for a meal at a specific 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 register_meal? +

Register the IIITH Mess MCP Server MCP server in PolicyLayer and add a rule for register_meal: 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 register_meal? +

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

Can I rate-limit register_meal? +

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

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

register_meal 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.