import_chat_invite · Tg MCP: Risk & Policy

WHAT IT DOES

What import_chat_invite does on Tgmcp

AI agents use import_chat_invite 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 import_chat_invite needs a policy

Importing a chat invite joins the agent to a new chat/group/channel. This is a reversible write action (you can leave a chat), not destructive. However, it could expand the agent's access or expose it to unwanted groups, hence medium severity.

From the tool's definition Import a chat invite by hash

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

import_chat_invite Rate-limited

import_chat_invite 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": {
    "import_chat_invite": {
      "limits": [
        {
          "counter": "import_chat_invite_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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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 import_chat_invite

What does the import_chat_invite tool do? +

Import a chat invite by hash. 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 import_chat_invite? +

Register the Tg MCP server in PolicyLayer and add a rule for import_chat_invite: 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 import_chat_invite? +

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

Can I rate-limit import_chat_invite? +

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

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

import_chat_invite 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.