I attempted to experience what happens if I request the creation of a Person (for example) with a note field exceeding the database limit of 255 characters (which IMO should be documented somewhere). The response from the server I received was:

BlockScore::InvalidRequestError: (Type: invalid_request_error) One or more required parameters are invalid (id_type) (Status: 400)

which while an error (good) was extremely unclear compared to what I expected given it references id_type which I do not know what that is.