Using the AWI (and also the JAVA UI) it is not possible to create or save a CALE Object without the required parameters, but using the AE REST API it is possible to do so and when trying to open this corrupted object, an error is displayed.
Currently, AE REST API does not have a sophisticated method to check the coherence and required parameters for each type of object that is about the be created via a json file.
Release : 12.2 and superior
Component : AUTOMATION ENGINE
Subcomponent: AE Rest API
Currently there is no json check on the AE Rest API Objects endpoint.
A Product Enhancement Request has been created for that:
PMAWA-15527: Add sophisticated solution to validate imported object