After handing over the trinket and once again going through all the same warnings that he had given to Percy before, albeit, in a lighter tone, the newcomer left after saying that he would contact Daneel when the time was right.
Even though he didn't mention it outright, Daneel knew that he was probably referring to the distraction for the Hero, because even if Daneel managed to sneak the trinket in, the Hero would be watching each and every movement of his. This meant that something had to be done to either pull the Hero away or draw away his attention for at least a second, and this was almost definitely what the man had left to put in place.