The Bread-inator was invented by Dr. Doofenshmirtz as a means removing a statue near his building that reminded him of a painful memory.
Inception, Purpose and Goals to be Achieved
When a statue of U.S. President Rutherford B. Hayes is erected in the park next to his building, it brings back some painful memories for Heinz Doofenshmirtz about his "folicular failure" (his inability to grow facial hair). He invented the Bread-inator to convert the statue into bread, which would then be eaten by hungry magpies that are released from a cage above the machine. Afterwards, the machine apparently would be used on other instances of beards that met with Doofenshmirtz's disapproval.
None. The Bread-inator operated as designed, and the magpies were able to eat the bread that it created.
Unknown at this point. It has not been used on any other occasions, but given Dr. Doofenshmirtz's tendancy to keep his past inventions, being used sometime in the future is still a possibility.