The phrase "to work the oracle" has other meanings, in my experience. It can be used to mean to succeed in an endeavor, especially through planning or plotting. It can also refer to marshaling resources, especially money.
Traditional oracles (like modern pundits), worked by giving complicated and weaselly answers.
Can you provide the source for your the use of "work the oracle" that you mentioned?
Art: In my experience, "work the oracle" does not to makes something sound complex or confusing.
1) If you think this is the case, can you provide a source to help me understand this use?
2) Do you want to use the phrase, or are you seeking a phrase that would mean "to make an explanation difficult?"