Wandering around in the Help documentation took a while even for me before I found basically the section that references these functions. It is the last section at this help link basically.
Create Manual Territories
The complete Territory Design toolset functionality-wise is still on the ArcGIS Business Analyst Desktop side so if someone is serious about this still set could recommend starting there first as there are several TS solution types.
Here are some syntax references for Territory Design toolbox: