If I have down Psi-Crystal World and my opponent reveals he is going to Search, does he also have to declare what he is searching for before I choose my phase? It makes sense to me that he would have to.
This has an impact if he wants to use that Search result to leech off of my phase choice.
You're allowed to know I'm calling "Settle", but not what card I'm settling.
Why would I have to reveal what category I'm searching for?