Google Cloud Vision will be the initial label provider for Computer-Aided Tagging. We need to work with the SRE team to get Cloud Vision API credentials set up in the private puppet repo and available to the appservers.
The MachineVision extension uses the official PHP client library to communicate with the Google Cloud Vision API, and that library expects to find a GOOGLE_APPLICATION_CREDENTIALS environment variable set to the filesystem location of a JSON file containing the API credentials.