Using motor circuit breaker buttons to start/stop motor
Yes, you can use that directly all by itself. The other more descriptive term for it is a "Manual Motor Starter" (MMS), because it is specifically designed to be used exactly the way you want to use it. There are however two things it does NOT do for you:


Operate remotely. With a contactor and push buttons, you can mount
those push buttons somewhere else. With this, you are right there
where the power is being switched, it's a little less safe overall
(but done all the time).
Low Voltage dropout. With a contactor and push buttons wired for
what is called "3 wire control", if the utility supply power fails,
the contactor drops out and does NOT come on again when power is
restored until you hit the Start button again. With an MMS like this
when power comes back on, the buttons remain in their last state and
your motor starts, suddenly and unexpectedly. THAT can be a very
serious safety problem. You can add an accessory to the MMS however
called an "Under Voltage Release" coil that will accomplish the same
function. If it's a dangerous machine that can hurt someone (as most
are), I highly recommend that option.