react · MTM - MCP Telegram MORE MCP: Risk & Policy

WHAT IT DOES

What react does on MTM - MCP Telegram MORE

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

WHY IT NEEDS A POLICY

Why react needs a policy

Adding an emoji reaction modifies Telegram message state by creating a new reaction object, but this is reversible (reactions can be removed) and has minimal blast radius. It does not read sensitive data (Read), execute code or trigger external operations beyond the reaction itself (Execute), delete anything (Destructive), or involve financial transactions (Financial).

From the tool's definition The tool 'react' performs an action that 'add[s] an emoji reaction to a message', which modifies message metadata by attaching a reaction. This is explicitly a write operation that creates new data (the reaction) on an existing message.

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 MTM - MCP Telegram MORE, so you can run agents against it safely.

FAQ

Questions about react

What does the react tool do? +

Add an emoji reaction to a message (Telegram whitelist). It is categorised as a Write tool in the MTM - MCP Telegram MORE 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 MTM - MCP Telegram MORE 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 MTM - MCP Telegram MORE. 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 MTM - MCP Telegram MORE MCP server (v0idhrt/MTM---MCP-Telegram-MORE). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.