How to import json table into PostgreSQL table?
That's what I would do:

SELECT v.*
FROM t
     ,jsonb_to_recordset(t.j::jsonb) AS v(token text, name text, description text);


Or in a 2-step query:

SELECT vr.*
FROM t
     ,jsonb_array_elements(j::jsonb) AS tt(recs)
     ,jsonb_to_record(tt.recs::jsonb) AS vr(token text, name text, description text);


source @dba.stex

dbfiddle