Monero-wallet-rpc usage

Hello. After using it for a while, i collected some questions that i would like to share with you. 1. Is there any way to get current node connection data? I've seen "set_daemon" method, but not the getting one. 2. Methods "set_attribute" and "get_attribute" are simply user-accessible storage, and do not store any settings in themselves, like CLI does, am I right? 3. Can i get account's tag by it's index or address, without requesting full list of tags and querying it? Thanks!