[2] Prior to entering parliament, he organised protests for subjects such as GCSB laws,[7] the TPPA,[8] and support for Australian Aboriginal rights.

[6] At the 2019 local-body elections, Tuiono stood for Mayor of Palmerston North as the Green Party candidate, running a campaign focusing on the local effects of climate change.

[16] In late November 2023, Tuiono assumed the Green Party's Pacific Region, education, workplace relations and safety, space, national security and intelligence, and overseas development assistance spokesperson portfolios.

The bill proposes restoring citizenship eligibility to a group of older Samoans born between 1924 and 1949 when Samoa was still a New Zealand mandate territory.

[20] The bill passed its second reading on 25 October, with the National party changing their position to support it after over 24,000 submissions were made during the select committee process.

[22] In December 2020, Tuiono joined fellow Green MP Golriz Ghahraman and Labour MP Ibrahim Omer in pledging to form a new parliamentary Palestine friendship group to "raise the voices of Palestinian peoples in the New Zealand Parliament" during an event organised by the Wellington Palestine advocacy group to mark the International Day of Solidarity with the Palestinian people.