AI agents call list_windows to retrieve information from Allcanuse without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Window enumeration is a read-only system probe that retrieves state information about open windows without modifying, executing, or deleting anything. Even in a post-exploitation context, listing windows is reconnaissance-only. Low severity because the blast radius of misuse is limited to information disclosure about the user's current window state.
From the tool's definition Tool name 'list_windows' suggests enumeration/retrieval of window information. Description is empty, but the semantic naming pattern ('list_*') across typical system tools indicates a query operation with no side effects.
Documented attack patterns abuse exactly the kind of access list_windows gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Allcanuse, and nothing reaches the server without passing your rules. This is the rule we recommend for list_windows:
{
"version": "1",
"default": "deny",
"tools": {
"list_windows": {}
}
}list_windows is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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list_windows. It is categorised as a Read tool in the Allcanuse MCP Server, which means it retrieves data without modifying state.
Register the Allcanuse MCP server in PolicyLayer and add a rule for list_windows: 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 Allcanuse. Nothing to install.
list_windows 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 list_windows 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 list_windows. 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.
list_windows is provided by the Allcanuse MCP server (ra1nyxin/allcanuse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Allcanuse, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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130 Allcanuse tools catalogued and risk-classified — across an index of 43,000+ MCP servers.