telegram-ban-user

THE RISK

Critical Risk

Why telegram-ban-user needs a policy

Banning a user is a severe, long-lasting administrative action that removes their access to a group or channel. While technically reversible (via an unban), the description emphasizes it is 'permanent until unbanned', making it effectively destructive in impact. It can cause significant harm if misused by an AI agent, removing users from communities without consent.

From the tool's definition Ban a user from a supergroup or channel (permanent until unbanned)

Documented attack patterns abuse exactly the kind of access telegram-ban-user gives an agent:

POLICY

How to control telegram-ban-user

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-ban-user:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "telegram-ban-user"
  ]
}

telegram-ban-user 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

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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-ban-user

What does the telegram-ban-user tool do? +

Ban a user from a supergroup or channel (permanent until unbanned). 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-ban-user? +

Register the MCP-Telegram MCP server in PolicyLayer and add a rule for telegram-ban-user: 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-ban-user? +

telegram-ban-user 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-ban-user? +

Yes. Add a rate_limit block to the telegram-ban-user 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-ban-user completely? +

Set action: deny in the PolicyLayer policy for telegram-ban-user. 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-ban-user? +

telegram-ban-user 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 →