edit_chat_photo · Tg MCP: Risk & Policy

WHAT IT DOES

What edit_chat_photo does on Tgmcp

AI agents use edit_chat_photo 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 edit_chat_photo needs a policy

This tool modifies chat/group/channel metadata (the profile photo) in a reversible manner. It falls under Write rather than Destructive because the change can be undone by uploading a different photo. The severity is medium because misuse could alter group/channel appearance affecting communications and trust, but the impact is limited to visual metadata without affecting core data or user access.

From the tool's definition Tool description states 'Edit the photo of a chat, group, or channel' – a modification operation. The verb 'edit' indicates reversible change to metadata (the chat/group/channel photo), not data deletion or execution of arbitrary commands.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

edit_chat_photo Rate-limited

edit_chat_photo 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": {
    "edit_chat_photo": {
      "limits": [
        {
          "counter": "edit_chat_photo_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 edit_chat_photo

What does the edit_chat_photo tool do? +

Edit the photo of a chat, group, or channel. Requires a file path to an image. 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 edit_chat_photo? +

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

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

Can I rate-limit edit_chat_photo? +

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

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

edit_chat_photo 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.