But the Council of Trent didn't CHANGE the existing canon. There WAS no "uncertainty that persisted up to the time of Trent". The canon of the Vulgate translation of St. Jerome is exactly the same as today's Catholic Bible and every Catholic Bible in between.
What some individuals might have "thought" about the canon (including St. Jerome) mattered not a bit---Pope Athanasius decided that the books the Jews had omitted from THEIR Scripture were to be included in the Catholic canon. And the fact that Jesus and his Apostles taught from those books seems to me to be pretty definitive as to their "canonicity".
And Pope Gregory decided otherwise in the 6th century:
"With reference to which particular we are not acting irregularly, if from the books, though not Canonical, yet brought out for the edification of the Church, we bring forward testimony. Thus Eleazar in the battle smote and brought down an elephant, but fell under the very beast that he killed" (1 Macc. 6.46). (Library of the Fathers of the Holy Catholic Church, (Oxford: Parker, 1845), Gregory the Great, Morals on the Book of Job, Volume II, Parts III and IV, Book XIX.34, p.424.)
Cordially,