The documentation here: CreateWebLayerSDDraft—ArcPy | ArcGIS for Desktop does not show samples of using this command with the optional parameters. I am having no luck using any parameters beyond service_type. The parameters seam to be ignored. Though the draft is created successfully it goes in the default ArcGIS Online user folder and no description, summary etc. values make it to the published service listing. Has anybody got good working examples using optional parameters?