Before 2019.3, you could edit the default annotation that Alteryx generated, but now if you go to change the annotation it's either 100% your own annotation or 100% the default annotation left by Alteryx.
I found it useful to retain a portion of Alteryx's default annotation (e.g., a long table name when setting up a database connection) while being able to cull the superfluous portions (e.g., didn't want to see the Source / Catalog). Now, if I want to retain the Table name I have to type it out.