The answer is no, Marcel Pagnol is not considered a musician. He was a French writer, filmmaker, and playwright, best known for his works such as "La Gloire de mon père" and the "Fanny" trilogy. While he had a passion for music and incorporated it into some of his films, his primary contributions lie in the fields of literature and cinema rather than music.
Mastering Marcel Pagnol: A Quiz on the Life and Works of the French Novelist, Playwright, and Filmmaker