Hi, as on subject, I would like to remove (programmatically) some tools from the Modify Features pane in order to leave the user with just the tools they need, plus some custom tool we'll add:

I know I can add my custom tools to it, setting categoryRefID attribute "esri_editing_commandList" on the daml, but I'm not able to find how to remove/hide the stock items (or entire categories) I don't need. Is there a way to accomplish this through the SDK?
An alternative way to implement the workflow I need would be to intercept the OnToolActivate event of the stock tools in order to do the things I need before the user starts to use the tool, but I couldn't find any way to listen to events of a stock tool. I know I can define my own tools in order to do it, but this would take me back to the beginning, since I would still need a way to act in case a stock tool is selected.
Any idea is appreciated, thanks in advance.