I noticed that several very different questions were tagged stools and noticed how feces was a synonym of it. So I believed that stools was merely about the outcome, i. e. the feces, not the action. Silly me - I should have dug deeper into... In fact, bowel-movement is also a synonym of stools. To add to my embarrassment, I already created defecation (but we can do something about it later, if necessary).
But going back to the original problem, I wondered if it did make sense to differentiate between the action and the result, instead of subsuming it under a "wastebasket" tag like stools.
Take Toddler pooping to get out of quiet time for example, wherein the stool itself is not the problem, but the action (bowel-movement).
However, Is it wrong to wash cloth diapers in a shared washing machine? solely concerns the stool, not the action.
The only prior discussion I found is What's a good tag for poop? and this is just about poop and doesn't address the difference between feces and bowel-movement.
So my question boils down to:
Should we differentiate between the stool itself and bowel-movement?
If so, the following tags might make sense (we could still decide to go for something different than defecation):