Delete a proxy host by ID.
AI agents call npm_delete_proxy_host to permanently remove resources in Nginx Manager — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Deletion of infrastructure configuration (proxy hosts) cannot be undone and causes permanent loss of the proxy routing setup. This meets the definition of Destructive category. Severity is high because an agent misusing this tool could disrupt traffic routing for multiple services by deleting critical proxy configurations, though actual blast radius depends on which proxy hosts are deleted.
From the tool's definition Tool name explicitly contains 'delete' and description states 'Delete a proxy host by ID.' The action is irreversible—once a proxy host is deleted, its configuration is permanently removed unless backed up externally.
Attacks that exploit this kind of access
Delete a proxy host by ID. It is categorised as a Destructive tool in the Nginx Manager MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Nginx Manager MCP server in PolicyLayer and add a rule for npm_delete_proxy_host: 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 Nginx Manager. Nothing to install.
npm_delete_proxy_host 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 npm_delete_proxy_host 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 npm_delete_proxy_host. 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.
npm_delete_proxy_host is provided by the Nginx Manager MCP server (kognar-ai/ngnix-manager-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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