The Kingdom qualified for the main draw after winning the June qualifier event in Rarotonga.
The team's technical director, Kilifi Uele, said local players had spent the past two months training together in Tonga, while two recruits from the United States and Australia only joined the squad this week.
Despite an imposing draw, with pool matches against Papua New Guinea, New Zealand and Tahiti, Uele said Tonga could hold their own.
