A tool is a way to solve a pre-existing problem that is outside the tool itself. Something which creates its own problems for you to solve is not a tool, but a

A tool is a way to solve a pre-existing problem that is outside the tool itself. Something which creates its own problems for you to solve is not a tool, but a toy. Whether a tool needs learning beforehand or not determines how likely you are to try the tool in the first place (by estimating whether the expected result justifies the effort), and how likely you are to actually be able to use the tool to solve that problem successfully. It helps to determine what the real goal is in this case. It is not really "allow me to browse through lots of headlines at maximum efficiency", but something more like "entertain me and let me keep in touch with people".