Well, it says:
"Howdy, guys. I can't program my MSP430 and PIC16 boards with your robust debugger. I need help ASAP.
Technically, it is possible to program targets different than ARM using our OpenOCD debugger. Practically, almost all users use the debugger for ARM programming and only ARM targets are officially supported. There is a reason that the prefix in the name of the debugger is 'ARM-'."
Sounds a lot different than "works with MSP430".
There are some MSP430 with traditional 4-wire JTAG, but many only have two-wire Spy-Bi-Wire. They would need additional hardware.
You should use one of the official TI tools if you don't intend to spend litterally month of development time.