telegram-set-chat-permissions

THE RISK

Medium Risk

Why telegram-set-chat-permissions needs a policy

This tool modifies chat configuration settings by changing default permissions for group members. While permissions can be reverted, the action is a Write operation that alters the behavior and access patterns within a group. It is not Destructive because permission changes are reversible and don't permanently delete data.

From the tool's definition The tool 'Set the default permissions for all non-admin members of a group, supergroup, or channel' modifies group settings that affect access controls.

Risk signalsAdmin/system-level operation

Documented attack patterns abuse exactly the kind of access telegram-set-chat-permissions gives an agent:

POLICY

How to control telegram-set-chat-permissions

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-set-chat-permissions:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "telegram-set-chat-permissions": {
      "limits": [
        {
          "counter": "telegram-set-chat-permissions_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

telegram-set-chat-permissions 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.

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.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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All 181 MCP-Telegram tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about telegram-set-chat-permissions

What does the telegram-set-chat-permissions tool do? +

Set the default permissions for all non-admin members of a group, supergroup, or channel. Omitted flags keep their current state; true = allowed, false = denied. It is categorised as a Write tool in the MCP-Telegram MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on telegram-set-chat-permissions? +

Register the MCP-Telegram MCP server in PolicyLayer and add a rule for telegram-set-chat-permissions: 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-set-chat-permissions? +

telegram-set-chat-permissions is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit telegram-set-chat-permissions? +

Yes. Add a rate_limit block to the telegram-set-chat-permissions 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-set-chat-permissions completely? +

Set action: deny in the PolicyLayer policy for telegram-set-chat-permissions. 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-set-chat-permissions? +

telegram-set-chat-permissions 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 →