AI agents call wmux_events_poll to retrieve information from Wmux without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries an event bus to read event data. It is a polling/query operation that observes state transitions but does not create, modify, delete, execute code, or move money. The cursor-based pagination pattern further confirms this is a read-only data retrieval mechanism.
From the tool's definition 'Poll the wmux EventBus for pane, process, agent, notification, and A2A task lifecycle events' — retrieves events without modifying state or triggering external operations.
Attacks that exploit this kind of access
Poll the wmux EventBus for pane, process, agent, notification, and A2A task lifecycle events. Cursor-based: pass. It is categorised as a Read tool in the Wmux MCP Server, which means it retrieves data without modifying state.
Register the Wmux MCP server in PolicyLayer and add a rule for wmux_events_poll: 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 Wmux. Nothing to install.
wmux_events_poll 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 wmux_events_poll 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 wmux_events_poll. 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.
wmux_events_poll is provided by the Wmux MCP server (openwong2kim/wmux). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
wmux_events_poll is one line of Wmux's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →