A modules that uses attributes must be inserted into a VBA project, not copy pasted.
attribute vb_name = "DescribeSubsAndFunctions"
option explicit
sub thisIsASub()
attribute thisIsASub.vb_description = "This is the sub's description"
debug.print "thisIsASub"
end sub
function thisIsAFunction as string
attribute thisIsAFunction.vb_description = "This is the function's description"
thisIsAFunction = "foo bar baz"
end function