Delete a Fly.io machine. Permanently removes a Fly machine that was used for Proctor exam execution. Use this to clean up machines that are no longer needed. Returns: - success: boolean indicating if the machine was deleted Use cases: - Clean up machines after exam completion - Remove stuck or fa...
AI agents call destroy_machine to permanently remove resources in Playwright Stealth — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool irreversibly deletes infrastructure (a Fly.io machine). The description explicitly states the action cannot be undone and terminates running processes. While the blast radius is limited to exam execution machines rather than arbitrary systems, the destructive nature and permanence classify it as Destructive rather than Execute.
From the tool's definition 'Permanently removes a Fly machine' and 'This action is irreversible' and 'Any running processes on the machine will be terminated'
Documented attack patterns abuse exactly the kind of access destroy_machine gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Playwright Stealth, and nothing reaches the server without passing your rules. This is the rule we recommend for destroy_machine:
{
"version": "1",
"default": "deny",
"hide": [
"destroy_machine"
]
}destroy_machine 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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Delete a Fly.io machine. Permanently removes a Fly machine that was used for Proctor exam execution. Use this to clean up machines that are no longer needed. Returns: - success: boolean indicating if the machine was deleted Use cases: - Clean up machines after exam completion - Remove stuck or failed machines - Free up resources - Remove machines that are no longer needed Warning: - This action is irreversible - Any running processes on the machine will be terminated - Use cancel_exam first if there. It is categorised as a Destructive tool in the Playwright Stealth MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Playwright Stealth MCP server in PolicyLayer and add a rule for destroy_machine: 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 Playwright Stealth. Nothing to install.
destroy_machine 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 destroy_machine 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 destroy_machine. 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.
destroy_machine is provided by the Playwright Stealth MCP server (pulsemcp/mcp-servers). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Playwright Stealth, 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.
68 Playwright Stealth tools catalogued and risk-classified — across an index of 43,000+ MCP servers.