telegram-leave-group

THE RISK

Critical Risk

Why telegram-leave-group needs a policy

Leaving a group or channel is an irreversible action in the sense that it removes the user's membership, potentially losing access to message history and requiring a new invite to rejoin. The action cannot be automatically undone and has significant social/operational consequences.

From the tool's definition Leave a Telegram group or channel

Documented attack patterns abuse exactly the kind of access telegram-leave-group gives an agent:

POLICY

How to control telegram-leave-group

PolicyLayer is an MCP gateway — it sits between your AI agents and MCP-Telegram, and nothing reaches the server without passing your rules. This is the rule we recommend for telegram-leave-group:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "telegram-leave-group"
  ]
}

telegram-leave-group disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

Create a free account and register MCP-Telegram — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More MCP-Telegram tools

Financial telegram-change-stars-subscription Cancel or restore a Telegram Stars subscription (payments.ChangeStarsSubscription). Pass c Financial telegram-convert-star-gift Convert a received Star Gift into Stars (non-reversible). The gift is removed from your pr Financial telegram-send-paid-reaction Send a paid reaction (★ Stars) on a channel post. Stars are spent from your balance. Optio Destructive telegram-clear-drafts Delete saved message drafts. Pass chatId to clear the draft for a single chat. Without cha Destructive telegram-clear-recent-emoji-statuses Clear your recently-used emoji status list (the Destructive telegram-close-poll Close a poll permanently. This is a one-way operation — closed polls cannot be reopened. Destructive telegram-delete-business-chat-link Delete a Telegram Business chat link by its slug. Requires Telegram Business subscription. Destructive telegram-delete-fact-check Remove a fact-check annotation. Requires fact-checker privileges.

All 181 MCP-Telegram tools →

Destructive tools on other servers

Android Forensics ADB MCP Server create_full_backup 0xarchive web3_revoke_key Frida Game Hacking MCP clear_scan cPanel MCP Server clear_spam_box

Go deeper

Critical-risk tools in MCP-Telegram → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about telegram-leave-group

What does the telegram-leave-group tool do? +

Leave a Telegram group or channel. It is categorised as a Destructive tool in the MCP-Telegram MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on telegram-leave-group? +

Register the MCP-Telegram MCP server in PolicyLayer and add a rule for telegram-leave-group: 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 MCP-Telegram. Nothing to install.

What risk level is telegram-leave-group? +

telegram-leave-group is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit telegram-leave-group? +

Yes. Add a rate_limit block to the telegram-leave-group 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 telegram-leave-group completely? +

Set action: deny in the PolicyLayer policy for telegram-leave-group. 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 telegram-leave-group? +

telegram-leave-group is provided by the MCP-Telegram MCP server (mcp-telegram/mcp-telegram). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP-Telegram tool call.

Start from MCP-Telegram, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →