telegram_pin_message · Agent Telegram MCP: Risk & Policy

WHAT IT DOES

What telegram_pin_message does on Agent Telegram

AI agents use telegram_pin_message to create or update resources in Agent Telegram — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Agent Telegram environment.

WHY IT NEEDS A POLICY

Why telegram_pin_message needs a policy

Pinning a message is a Write operation—it modifies chat state reversibly without deleting data or executing arbitrary code. The severity is medium because misuse could spam notifications, clutter the chat interface, or manipulate conversation visibility, but the impact is confined to chat organization and is easily reversible. High confidence because the operation is clearly documented as a state modification.

From the tool's definition The tool description states it will 'Pin a message in a chat', which modifies the state of a message (making it pinned) and alters the chat's display/organization. This is a reversible modification (messages can be unpinned).

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

telegram_pin_message Rate-limited

telegram_pin_message 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": {
    "telegram_pin_message": {
      "limits": [
        {
          "counter": "telegram_pin_message_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 Agent Telegram, so you can run agents against it safely.

FAQ

Questions about telegram_pin_message

What does the telegram_pin_message tool do? +

Pin a message in a chat (bot must be admin with pin_messages permission). It is categorised as a Write tool in the Agent 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_pin_message? +

Register the Agent Telegram MCP server in PolicyLayer and add a rule for telegram_pin_message: 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 Agent Telegram. Nothing to install.

What risk level is telegram_pin_message? +

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

Can I rate-limit telegram_pin_message? +

Yes. Add a rate_limit block to the telegram_pin_message 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_pin_message completely? +

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

telegram_pin_message is provided by the Agent Telegram MCP server (tharindumendis/agent_telegeam_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.