How to receive notifications on mcp client side?

I am trying to send few logging events to the client during a tool invocation. I am using "Context.info('Hello)" inside a mcp.tool decorated function. I am using FASTMcp for hosting tools. I was expecting to receive these notifications in my ClientSession's "_received_notification" method. But I don't seem to get this to work. I do not see that _received_notification is getting called.  