Final answer:
AEF Online is the NIPRNet-based planning tool that the Air Force uses to provide deployment readiness information, including individual medical readiness at the unit level, for commanders.
Step-by-step explanation:
The Air Force uses various planning tools to support Air and Space Expeditionary Force (AEF) deployments. The specific tool in question, which is a NIPRNet-based system providing information on deployment readiness, including individual medical readiness at the unit level for commanders via AEF Online, is AEF Online itself.
AEF Online allows commanders to access up-to-date information on the medical readiness of their personnel, which is essential for preparing units for deployment. It integrates various readiness factors and presents them in a user-friendly format, so that commanders can make informed decisions about their force's ability to deploy.