AI agents call get_foreground_window_info to retrieve information from MCP Windows without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool appears to retrieve information about the currently active (foreground) window. This is a read-only operation with no side effects—it queries system state but does not modify, execute commands, or delete anything. The lack of description lowers confidence slightly, but the naming convention and sibling tool patterns confirm a Read classification.
From the tool's definition Tool name 'get_foreground_window_info' indicates retrieval of window metadata. Sibling tools like 'get_clipboard', 'get_media_sessions', 'get_theme_mode', 'get_volume', 'get_window_list', and 'list_open_windows' are all read-only queries.
Documented attack patterns abuse exactly the kind of access get_foreground_window_info gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Windows, and nothing reaches the server without passing your rules. This is the rule we recommend for get_foreground_window_info:
{
"version": "1",
"default": "deny",
"tools": {
"get_foreground_window_info": {}
}
}get_foreground_window_info is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_foreground_window_info. It is categorised as a Read tool in the MCP Windows MCP Server, which means it retrieves data without modifying state.
Register the MCP Windows MCP server in PolicyLayer and add a rule for get_foreground_window_info: 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 MCP Windows. Nothing to install.
get_foreground_window_info 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_foreground_window_info 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_foreground_window_info. 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_foreground_window_info is provided by the MCP Windows MCP server (secretiveshell/mcp-windows). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from MCP Windows, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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28 MCP Windows tools catalogued and risk-classified — across an index of 43,000+ MCP servers.