List all panes in a tmux session with their details (index, size, active status).
AI agents call tmux_list_panes to retrieve information from Tmux MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays information about panes in a tmux session. It has no side effects—it does not create, modify, delete, or execute anything. It is a pure read operation that gathers data about the current terminal session state. The low severity reflects minimal risk even if misused by an agent, as listing panes cannot harm data or systems.
From the tool's definition Tool name 'tmux_list_panes' and description 'List all panes in a tmux session with their details' indicate a retrieval operation that queries the state of tmux panes without modification or execution.
Attacks that exploit this kind of access
List all panes in a tmux session with their details (index, size, active status). It is categorised as a Read tool in the Tmux MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Tmux MCP Server 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 MCP Server. 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 MCP server (mediocretriumph/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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