Get a tmux session by name.
AI agents call get_session 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.
This tool retrieves metadata or state information about an existing tmux session. It performs a lookup/fetch operation without modifying, deleting, or executing any commands. Even in the context of a tmux control library where sibling tools include destructive operations (kill_session, kill_pane), this specific tool is purely informational.
From the tool's definition Tool name is 'get_session' with description 'Get a tmux session by name.' The verb 'Get' and action of retrieving session information by name indicates a read-only query operation with no side effects.
Attacks that exploit this kind of access
Get a tmux session by name. 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 get_session: 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.
get_session 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 get_session 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 get_session. 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.
get_session 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.
get_session is one line of TmuxControlLib MCP Server's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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