Example:
1. Create an employee, set its short ID to "xxxx" to violate short ID length constraint.
2. Save the row.

Error message:

The Employee object you submitted was invalid. The following constraints were violated: size must be between 1 and 3

The field breaking the constraint is missing.

Also, the format of the message could be improved to better accommodate multiple constraint violation messages:

The Employee object you submitted was invalid. The following constraints were violated: size must be between 1 and 3,Name should not contain any leading or trailing whitespaces