react · Cursor Discord Channels MCP: Risk & Policy

WHAT IT DOES

What react does on Cursor Discord Channels

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

WHY IT NEEDS A POLICY

Why react needs a policy

This tool modifies Discord message state by adding a reaction, which is a reversible change (reactions can be removed). It does not read-only query data (Read), execute arbitrary code (Execute), permanently delete data (Destructive), or handle financial transactions (Financial).

From the tool's definition Tool adds/creates an emoji reaction to a Discord message, which modifies the message's state by appending a reaction. Description explicitly states 'Add an emoji reaction', indicating a creation/modification action.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

react Rate-limited

react 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": {
    "react": {
      "limits": [
        {
          "counter": "react_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 Cursor Discord Channels, so you can run agents against it safely.

FAQ

Questions about react

What does the react tool do? +

Add an emoji reaction to a Discord message. Unicode emoji work directly; custom emoji need the <:name:id> form. It is categorised as a Write tool in the Cursor Discord Channels MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on react? +

Register the Cursor Discord Channels MCP server in PolicyLayer and add a rule for react: 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 Cursor Discord Channels. Nothing to install.

What risk level is react? +

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

Can I rate-limit react? +

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

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

react is provided by the Cursor Discord Channels MCP server (lilyzhng/cursor-discord-channels). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

react is one line of Cursor Discord Channels's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

Teams ship this data inside their own products. See what a licence covers →