Richardson, 33, who announced his retirement at a press conference in Christchurch on Friday, had a woeful Test series against the Australians, scoring just 48 runs from four innings.
Speculation surrounding his retirement heightened when he said after the tour that the formidable Australian bowling had made him reconsider about his playing future.
"I have been contemplating retiring for the past year," Richardson told the press conference.
"The fact I have had a lean run over the last four Tests wasnt the reason for coming to this decision.
"Many cricketers have gone much longer than four Tests without scoring runs, but it highlighted to me that I am no longer in the mind-set I was in when I enjoyed playing the most.
"I am looking forward to becoming more involved in the media. I have a passion for sports journalism, writing and commentary and I will pursue various options along those lines."
Richardson, who became one of New Zealand's most successful top-order batsmen, hit four centuries at an average of 44.77 from 38 Tests.