promote_admin · Tg MCP: Risk & Policy

WHAT IT DOES

What promote_admin does on Tgmcp

AI agents use promote_admin 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 promote_admin needs a policy

Promoting a user to admin grants elevated permissions within a group or channel. This is a reversible write operation (admin status can be revoked), but the blast radius is high because a misused promotion could give an adversarial or unintended user administrative control over a community, enabling them to further harm members, delete content, or ban users.

From the tool's definition Promote a user to admin in a group/channel

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

promote_admin Rate-limited

promote_admin 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": {
    "promote_admin": {
      "limits": [
        {
          "counter": "promote_admin_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 promote_admin

What does the promote_admin tool do? +

Promote a user to admin in a group/channel. 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 promote_admin? +

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

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

Can I rate-limit promote_admin? +

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

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

promote_admin 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.