User-managed resources must be created in dedicated namespaces.

Dedicated namespaces act as security boundaries, limiting the blast radius in case of security incidents or misconfigurations. If an issue arises within a specific namespace, it is contained within that namespace and does not affect the resources in other namespaces. Kubernetes provides Role-Based Access Control (RBAC) mechanisms, and namespaces are a fundamental unit for access control. Using dedicated namespaces for user-managed resources provides a level of isolation. Each namespace acts as a separate environment, allowing users or teams to deploy their applications and services without interfering with the resources in other namespaces. This isolation helps prevent unintentional conflicts and ensures a more predictable deployment environment.