That is actually a decent summary of what they were attempting to do with MK-ULTRA. The ultimate goals was the ability to manipulate a human mind so that a targeted individual could commit any kind of morally transgressive act with zero conscience, zero hesitation & zero ability to be able to compromise the CIA after the fact. The idea of using such techniques, involving psychotropic drugs or otherwise, was especially appealing regarding use against high-ranking officers or government officials within regimes that the United States was opposed to at that time.
It was also based on a lot of erroneous assumptions and misplaced beliefs on the part of the United States government at that time, in regards to the Soviet Union and their capabilities. For example, after József Mindszenty was forced to incriminate himself during his show trial in Hungary during the late 1940s, people in the CIA assumed that the Soviet Union was exercising "mind control" techniques on him. In reality there was a much simpler explanation: the authorities in Hungary at that time simply used conventional methods of brutality and torture against him, until he agreed to say what they wanted him to say, and it was as simple as that. But imaginations were running wild at that time during the Cold War.