MCP note: **`available_on_public_internet: false` with `delegate_auth_to_upstream: true` (oauth2, interactive - not `client_credentials`)** - LiteLLM still allows the anonymous upstream PKCE path (no proxy API key for `/authorize` and matching MCP routes). The internal-only flag mainly affects other surfaces (e.g. IP-based discovery). Rely on the upstream IdP and network policy; the dashboard shows a warning when both are set, and the proxy logs a warning when the server is loaded from config or the database