Typically agreements of this kind between central banks do remain confidential. The PBoC wanted it to be confidential in this case.
To give you a flavour of what's in the agreement broadly, it provides for regular dialogue between the two central banks on the growth of the renminbi and liquidity conditions in Canada.
In many respects it formalizes the kinds of conversations you would typically see between central banks in any case where one central bank had an interest and its currency was being used in another jurisdiction. In many respects I would think it would provide for a kind of conventional central bank dialogue.