chat_me_message

What chat_me_message does on Slack

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

Why chat_me_message is rated Medium

This tool creates new data (a message) in Slack channels, making it a Write action. It is reversible (messages can be deleted), so it does not qualify as Destructive. The severity is medium because an AI agent could spam channels, post inappropriate content, or impersonate users through automated messages, causing reputational or operational disruption, but the blast radius is limited to message creation rather than…

From the tool's definition Tool name 'chat_me_message' combined with description 'Send a /me message to a channel' indicates the tool creates and posts a message to Slack, which is a write operation that modifies channel state by adding new content.

The rule that runs chat_me_message safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Slack, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For chat_me_message, this is the rule to start with:

{
  "version": "1",
  "default": "deny",
  "tools": {
    "chat_me_message": {
      "limits": [
        {
          "counter": "chat_me_message_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

Questions about chat_me_message