This only deals with contacts, not tags.

But patches for that are accepted at nostr:naddr1qqrkvmmvd3hhwucpz3mhxue69uhhyetvv9ujumn0wd68ytnzvupzqwlsccluhy6xxsr6l9a9uhhxf75g85g8a709tprjcn4e42h053vaqvzqqqrhny4gexp5