I've dealt with many recruiters. You don't have to play by their rules. Insist on getting the details you want in text before a phone call. If they refuse, say

I've dealt with many recruiters. You don't have to play by their rules. Insist on getting the details you want in text before a phone call. If they refuse, say ok that's fine and walk away. They will come back to you. Right now, especially, it's a sellers' (developers) market. You have far more negotiating power than you realise.