How did Palestrina's Missa Papae Macellus conform to th Council of Trent's requirements?

Palestrina's Missa Papae Marcelli conformed to the Council of Trent's requirements by emphasizing clarity of text through a controlled use of polyphony and avoiding excessive ornamentation in the music. The text could be clearly heard and understood, reflecting the Council's desire for sacred music to enhance the worship experience without overshadowing the liturgical text.