I've just skimmed through this thread but can anyone tell me where Spock disappeared to between books?
We know he was aboard the Enterprise
when she returned from the Gamma Quadrant into the middle of the Federation/Typhon Pact firefight. Beyond that, he ceased to be a relevant player in the story, and we don't know his fate. I would presume that, the joint Federation-Romulan mission having ended, he would have transferred off at Bajor and returned to Earth, Vulcan, or Romulus.
And had Spock simply mind-probed the captured Tomalek,wouldn't that have spared a lot of to-ing and fro-ing?
(And please,don't give me any guff about Spock being reluctant to use his gifts that way...ST6 puts the lie to that).
James Swallow's 2011 novel Cast No Shadow
covers the question of what Spock did to Valeris in Star Trek VI
. Suffice it to say that it's not something he'd do again.
Also, your question could just as easily be asked of any telepathic individual in the Federation. That the Federation Security Agency did not simply have another Vulcan, or a Betazoid, or an Ullian, or any other telepathic Federate, probe Tomalak's mind, strongly implies that such things are by the 24th Century considered a violation of Federation law.