send_sticker · Tg MCP: Risk & Policy

WHAT IT DOES

What send_sticker does on Tgmcp

AI agents use send_sticker 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 send_sticker needs a policy

Sending a sticker is a write operation that creates a new message in a chat. While it modifies the chat state and message history, it is reversible through message deletion. It does not execute arbitrary code, delete data irreversibly, or involve financial transactions.

From the tool's definition Tool name is 'send_sticker' and description states 'Send a sticker to a chat', which creates new content (a sticker message) in a chat.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

send_sticker Rate-limited

send_sticker 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": {
    "send_sticker": {
      "limits": [
        {
          "counter": "send_sticker_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 send_sticker

What does the send_sticker tool do? +

Send a sticker to a chat. File must be a valid .webp sticker file. 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 send_sticker? +

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

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

Can I rate-limit send_sticker? +

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

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

send_sticker 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.