register_extra · IIITH Mess MCP Server MCP: Risk & Policy

WHAT IT DOES

What register_extra does on IIITH Mess MCP Server

AI agents use register_extra 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_extra needs a policy

This is a Write operation because it creates/adds a new extra meal registration record. It is not Destructive (no deletion/overwrite), not Execute (no arbitrary code execution), not Financial (though it may affect billing, it doesn't directly move money or create financial obligations—that's handled by the bill system).

From the tool's definition The tool name 'register_extra' and description 'Register for an extra item' indicates a create or add operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

register_extra Rate-limited

register_extra 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_extra": {
      "limits": [
        {
          "counter": "register_extra_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_extra

What does the register_extra tool do? +

Register for an extra item. 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_extra? +

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

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

Can I rate-limit register_extra? +

Yes. Add a rate_limit block to the register_extra 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_extra completely? +

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

register_extra 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.