AI agents call cmux_list to retrieve information from Cmux without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs data retrieval and enumeration (list operation) of existing cmux objects. It has no side effects, creates no modifications, executes no code, and performs no destructive or financial actions. The context of terminal pane/workspace management indicates this lists existing panes or workspaces rather than modifying them.
From the tool's definition Tool name 'cmux_list' and description 'List cmux objects of the given kind' indicate a read-only operation that retrieves information without modifying system state.
Attacks that exploit this kind of access
List cmux objects of the given kind. It is categorised as a Read tool in the Cmux MCP Server, which means it retrieves data without modifying state.
Register the Cmux MCP server in PolicyLayer and add a rule for cmux_list: 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 Cmux. Nothing to install.
cmux_list 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 cmux_list 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 cmux_list. 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.
cmux_list is provided by the Cmux MCP server (puchkoff/cmux-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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