AI agents call browser_net_get_websocket_frames to retrieve information from Browser without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves WebSocket frame data for inspection purposes. 'Get' is a read operation, and 'inspecting' confirms passive observation. There is no indication of side effects, code execution, data modification, or deletion. The tool observes network communication but does not control it.
From the tool's definition Tool name 'browser_net_get_websocket_frames' and description 'Get WebSocket frames for inspecting real-time communication' indicate retrieval and inspection of existing data without modification or execution.
Attacks that exploit this kind of access
Get WebSocket frames for inspecting real-time communication (see browser_docs). It is categorised as a Read tool in the Browser MCP Server, which means it retrieves data without modifying state.
Register the Browser MCP server in PolicyLayer and add a rule for browser_net_get_websocket_frames: 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 Browser. Nothing to install.
browser_net_get_websocket_frames 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 browser_net_get_websocket_frames 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 browser_net_get_websocket_frames. 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.
browser_net_get_websocket_frames is provided by the Browser MCP server (ricardodeazambuja/browser-mcp-server). 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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