tmux_split_pane · TmuxControlLib MCP Server MCP

WHAT IT DOES

What tmux_split_pane does on TmuxControlLib MCP Server

AI agents invoke tmux_split_pane to trigger actions in TmuxControlLib MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why tmux_split_pane needs a policy

Splitting a tmux pane creates a new shell/pane within a terminal session, which is an external operation that modifies the terminal environment. Given the server's purpose of controlling tmux sessions and the sibling tools (create_session, create_window, kill_pane), this tool almost certainly creates a new pane split in a tmux session. This falls under Execute as it triggers external terminal operations.

From the tool's definition Tool name 'tmux_split_pane' on a server that 'Enables Claude to control tmux sessions, manage windows and panes'; description is empty.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

tmux_split_pane Rate-limited

tmux_split_pane stays usable, but rate-capped — a runaway agent can't fire it dozens of times 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_split_pane": {
      "limits": [
        {
          "counter": "tmux_split_pane_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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_split_pane

What does the tmux_split_pane tool do? +

tmux_split_pane. It is categorised as a Execute tool in the TmuxControlLib MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on tmux_split_pane? +

Register the TmuxControlLib MCP Server MCP server in PolicyLayer and add a rule for tmux_split_pane: 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_split_pane? +

tmux_split_pane is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit tmux_split_pane? +

Yes. Add a rate_limit block to the tmux_split_pane 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_split_pane completely? +

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

tmux_split_pane 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.