List all panes across all sessions
AI agents call list-panes to retrieve information from Ryan's 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 lists panes—a read-only operation with no side effects, no data modification, and no command execution. It simply enumerates existing tmux panes across sessions. The blast radius of misuse is minimal, as it cannot alter system state or trigger operations.
From the tool's definition Tool name 'list-panes' and description 'List all panes across all sessions' indicate a query operation that retrieves information about tmux panes without modifying any state.
Attacks that exploit this kind of access
List all panes across all sessions. It is categorised as a Read tool in the Ryan's Tmux MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Ryan's Tmux MCP Server MCP server in PolicyLayer and add a rule for 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 Ryan's Tmux MCP Server. Nothing to install.
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 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 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.
list-panes is provided by the Ryan's Tmux MCP Server MCP server (ryancnelson/ryan-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.
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