AI agents call close_window to permanently remove resources in Wuying AgentBay — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Closing a window is an irreversible action that terminates the window and any unsaved state within it. The action cannot be undone once executed, making it Destructive. Severity is medium as it affects a single window session but could disrupt ongoing operations or lose unsaved work.
From the tool's definition Close a specific window by its window ID
Documented attack patterns abuse exactly the kind of access close_window gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Wuying AgentBay, and nothing reaches the server without passing your rules. This is the rule we recommend for close_window:
{
"version": "1",
"default": "deny",
"hide": [
"close_window"
]
}close_window disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
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Close a specific window by its window ID. It is categorised as a Destructive tool in the Wuying AgentBay MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Wuying AgentBay MCP server in PolicyLayer and add a rule for close_window: 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 Wuying AgentBay. Nothing to install.
close_window is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the close_window 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 close_window. 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.
close_window is provided by the Wuying AgentBay MCP server (michael98671/agentbay). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Wuying AgentBay, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
59 Wuying AgentBay tools catalogued and risk-classified — across an index of 43,000+ MCP servers.