The REST connector wizard will generate class names that start with <Org> or <Org>-<Div>- or <Org>-<FW>- depending on the ECS layer you are generating for. To keep the name short as possible just use <Org> .
The REST wizard then must append "-<Service>"
Then it must append "_Response_GET" and/or "_Response_POST" depending on the REST methods used.
If the response contains a List. the REST wizard must also append the list's JSON element name after "-<Service>" when forming a class name.
The maximum length of a pzInsKey is 256 character.
The beginning of a pzInsKey is the class name in all caps.
The rest of the pzInsKey is the rule name followed by a timestamp.