tmux_create_window · TmuxControlLib MCP Server MCP

WHAT IT DOES

What tmux_create_window does on TmuxControlLib MCP Server

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

WHY IT NEEDS A POLICY

Why tmux_create_window needs a policy

Based on the naming convention and sibling tools (create_session, create_window), this tool likely creates a new tmux window, which is a reversible write operation. Description is empty, reducing confidence. It could potentially be Execute-level if it spawns commands, but creation alone is Write.

From the tool's definition Tool name 'tmux_create_window' on a server that manages tmux sessions, windows, and panes. Description is empty.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

tmux_create_window Rate-limited

tmux_create_window 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": {
    "tmux_create_window": {
      "limits": [
        {
          "counter": "tmux_create_window_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 TmuxControlLib MCP Server, so you can run agents against it safely.

FAQ

Questions about tmux_create_window

What does the tmux_create_window tool do? +

tmux_create_window. It is categorised as a Write tool in the TmuxControlLib MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on tmux_create_window? +

Register the TmuxControlLib MCP Server MCP server in PolicyLayer and add a rule for tmux_create_window: 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 TmuxControlLib MCP Server. Nothing to install.

What risk level is tmux_create_window? +

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

Can I rate-limit tmux_create_window? +

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

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

tmux_create_window is provided by the TmuxControlLib MCP Server MCP server (jbwinters/tmuxcontrollib). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.