AI agents call get_finder_window_path to retrieve information from Mac without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries system state (the file path of an open Finder window) and returns information with no side effects or ability to modify data, execute code, or trigger external operations. It is a straightforward Read operation with minimal security impact.
From the tool's definition Tool description: 'Gets the path of the frontmost Finder window' — a read-only operation that retrieves the current file path without modifying or executing anything.
Attacks that exploit this kind of access
Gets the path of the frontmost Finder window. It is categorised as a Read tool in the Mac MCP Server, which means it retrieves data without modifying state.
Register the Mac MCP server in PolicyLayer and add a rule for get_finder_window_path: 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 Mac. Nothing to install.
get_finder_window_path 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_finder_window_path 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_finder_window_path. 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_finder_window_path is provided by the Mac MCP server (laststance/mac-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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