tmux_get_pane
AI agents call tmux_get_pane to retrieve information from TmuxControlLib MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'get_pane' tool retrieves information about a tmux pane without modifying state. While it accesses terminal output that may contain sensitive data, the tool itself performs no side effects. Severity is low because exposure risks are limited to information disclosure from the pane's current state, with no destructive or execution capabilities.
From the tool's definition Tool name 'get_pane' combined with sibling context ('capture_history', 'capture_pane', 'get_session', 'get_window') indicates a retrieval operation.
Attacks that exploit this kind of access
tmux_get_pane. It is categorised as a Read tool in the TmuxControlLib MCP Server MCP Server, which means it retrieves data without modifying state.
Register the TmuxControlLib MCP Server MCP server in PolicyLayer and add a rule for tmux_get_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.
tmux_get_pane is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the tmux_get_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.
Set action: deny in the PolicyLayer policy for tmux_get_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.
tmux_get_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.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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