The first internal tool I shipped solved the central calculation and still frustrated its users. They spent more time preparing a file and finding the result than running the calculation itself. The feature worked, but the surrounding workflow needed attention.
Observe the steps around the button
Watching someone use the tool revealed opportunities that were invisible in the original request. Remembering a safe default and producing a recognizable filename removed more friction than another configuration option. Clear error messages also helped people recover without asking the developer to interpret a log.
Adoption often depends on the ordinary details around the main feature.
I now treat support and maintenance as part of the design. The tool should explain its status, preserve useful context, and be simple enough for another person to operate. A modest tool that remains dependable can outlast a much more ambitious prototype.