mute_chat · Tg MCP: Risk & Policy

WHAT IT DOES

What mute_chat does on Tgmcp

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

WHY IT NEEDS A POLICY

Why mute_chat needs a policy

Muting a chat modifies notification settings for that chat. This is a reversible configuration change (chats can be unmuted), so it falls under Write. The blast radius is low as it only affects notification delivery, not messages or data.

From the tool's definition Mute notifications for a chat

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mute_chat Rate-limited

mute_chat 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": {
    "mute_chat": {
      "limits": [
        {
          "counter": "mute_chat_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 Tgmcp, so you can run agents against it safely.

FAQ

Questions about mute_chat

What does the mute_chat tool do? +

Mute notifications for a chat. It is categorised as a Write tool in the Tgmcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on mute_chat? +

Register the Tg MCP server in PolicyLayer and add a rule for mute_chat: 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 Tgmcp. Nothing to install.

What risk level is mute_chat? +

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

Can I rate-limit mute_chat? +

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

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

mute_chat is provided by the Tg MCP server (oevortex/tgmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.