A contractionary stance of monetary policy is adopted when the RBA intends to raise the cash rate. In other words a higher cash rate means lower economic growth.
Also, chnages in the short end of the yield curve are affected by changes in the cash rate, and interest rates at the long end will be influenced by the inflationary expectations.
On the other hand, the RBA would ease the stance on MP by buying CGS, thus increasing the supply of cash.