I want to know the answer to the following question:
What agency did Hoover not tell about the code break and the discoveries gained from it?
All the background I'm provided with is that "Also during this time, a joint US/UK code-breaking effort (the Venona project)—with which the FBI was heavily involved—broke Soviet diplomatic and intelligence communications codes, allowing the US and British governments to read Soviet communications.". Is that enough to answer the question?
Answer: no