Are there any books on Hadith grading in the Shia tradition, such as for those narrations contained in Al-Amali by Sheikh Sadooq and Uyoon Akhbar al-Raza?
Yes,our great scholars study every narration and go through the chain of narrators.and classify generation which is narrated by authentic narrator by another authentic narrator till the imam or the Prophet,as Saheeh,fully authentic we also have narrations which are less in its degree which is called Hassan[good].we also have narrations which are called Maqbool or Maqboola which mean’s accepted.we then have a narration which is classified as Mursala when the chain of narrators have a gap.we also have a narrations which are classified as weak when some of the narrators are not authentic or unknown.
wassalam.