Though I love the array of tools that Krita offers within their Toolbox Docker, is there any way to customize what tools are actually visible? Out of the 34 tools, I maybe only use roughly four of them. It would help me greatly de-clutter my workspace if I knew how to do this one thing. I've searched within the drop-down Settings menu and online, but all I see are tutorials on how to modify what is visible within the Toolbar rather than the Toolbox Docker. Any and all suggestions will be greatly appreciated!

There's no option to customize that in the gui, but you could add tools to the ToolsBlacklist entry in kritarc. You will have to find the names for the tools in the source code, though.