The main functions of the Ministry of Information and Communications is its core role as the Government of Tonga's main regulating body for all communication services and lead communicator for government information in creating awareness of government policies, programs and activities.

Main Duties and Responsibilities:

1. To provide accurate, timely, balanced and fair information from Government to the media and for for dissemination to the public.
2. To Develop media and information policy for the Government, and coordinate information in Government and its agencies
3. To implement or cause to be implemented effectively, the National Information Communication Policy.
4. To establish coordination among communication related agencies and to implement their functions effectively.
5. To enable the communication agencies to be capable of providing appropriate technology based modern, efficient communication services effectively and affordably available to the general public for overall national development.
6. To make communication media active for the promotion of international mutual understanding and cooperation.
7. To promote contact for cooperation and understanding with the international agencies related to the communication sector in order to cause Tonga to benefit from them.
8. To develop/promote and disseminate information and news that reflect national values, culture, art, and heritage.
9. To formulate and implement relevant Acts/Regulations for the allocation, distribution, management of frequency/spectrum including the maintenance of a central inventory and monitoring the radio spectrum.
10. To formulate/implement and or cause to be implemented Acts/Regulation code of conduct in matters related to Broadcasting.
11. To maintain, and or cause to maintain a cordial relationship between the government and the press.
12. To formulate policy/rules and implement and or cause to be implemented for a good security, and protection of the infrastructure/institution related to the information and communication agencies.