You do not have to be an idiot to miss the small triangles on many of the tool icons that indicate there are other tools accessible from that icon location. To get the fly-out @HVDB Photography shows in his reply, you can either click on that tiny little triangle or just click & hold on the icon & after a short delay the fly-out will open.
You can also customize the tool panel by choosing "Customize Tools ..." (not "Customize Toolbar") on the View menu, so for example you could add the Inpainting tool to some location in the panel not shared by any other tool.
