Jeeves is the first Repair bot that is not 'consumed' on use, although requiring a large amount of resources to craft. It is also the first bot to provide bank access, although only to Engineers.
[Handful of Cobalt Bolts] can randomly have 1 to 3 bolts created during manufacturing. The above ingredient list is assuming the lowest common denominator for the amount of [Cobalt Ore] required. Your results may vary.
Like other repair bots, Jeeves does not survive logout*, or entering or leaving a battleground or instance.
*After summoning Jeeves in Dalaran, I logged my current character off and went straight to a different one in Dalaran. Jeeves was still there in the same place with his personal timer. So he DOES persist to a certain degree.
It is quite possible that Jeeves is a reference to the fictional butlervalet gentleman's gentleman Jeeves, of P.G. Wodehouse fame.