Clarify tool is offline.
Clarify tool is offline.

PiperOrigin-RevId: 254249122

GoogleCloudPlatform/healthcare-deid,GoogleCloudPlatform/healthcare-deid,GoogleCloudPlatform/healthcare-deid,GoogleCloudPlatform/healthcare-deid,GoogleCloudPlatform/healthcare-deid,GoogleCloudPlatform/healthcare-deid