I don't think Tom was even informed about Vito's plan to send Luca to find out what was underneath Sollozzo's fingernails, so you can't blame that one on him.
Agreed, dt: Luca took his orders directly from Vito.
Ntra la porta tua lu sangu � sparsu, E nun me mporta si ce muoru accisu... E s'iddu muoru e vaju mparadisu Si nun ce truovo a ttia, mancu ce trasu.