Add tests that perform a regular scripted find, record the result (id list?) and compare it to the same find as encoded in JSON and run by the module script. There should be no discrepancy.

Different developers use different parameter and error encoding. Adding a translator script might make this module easier to work with.

However, using JSON really isn't that hard, so maybe developers should just do that for consistency and transform the error output as needed for logging in their scripts.