AI agents call tmux_list_panes to retrieve information from Tmux without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information about existing tmux panes without creating, modifying, deleting, or executing anything. It has no side effects and poses minimal security risk—an AI agent misusing it could at worst enumerate session details, but cannot cause operational harm. Severity is low due to limited blast radius.
From the tool's definition Tool name 'tmux_list_panes' and description 'List tmux panes with their IDs, dimensions, and status' indicate a query/retrieval operation with no modification of state.
Attacks that exploit this kind of access
List tmux panes with their IDs, dimensions, and status. It is categorised as a Read tool in the Tmux MCP Server, which means it retrieves data without modifying state.
Register the Tmux MCP server in PolicyLayer and add a rule for tmux_list_panes: 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 Tmux. Nothing to install.
tmux_list_panes 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_list_panes 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_list_panes. 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_list_panes is provided by the Tmux MCP server (wenlixiao-cs/tmux-mcp). 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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