Below are the more or less hidden TSM show commands. More or less, because Tivoli Support lately is spreading the word that they exist and some of them are even mentioned in TSM documentation. They are splitted in TSM client and TSM Server commands, and all are verified and tested on TSM Client 126.96.36.199 and TSM Server 188.8.131.52.
SHOW SYSTEMOBJECT / SHOW SYSTEMSTATE
SHow INVObject 0 ObjectId
SHow DAMAGED poolname