In Keyword, we already have the ability to 'Insert Comments', which is quite useful for things like debugging (i.e. Comment: If this test case fails, check the customer's account settings. Verify th...
Just create a test that's only the comments and call it something useful "Preconditions" or "Postconditions" or "Debug hints" and add it into the test suite but disable it. It will never run in the list of tests but it will be there if someone goes looking for help.