which can break over time or upon damage
By over time do you mean an axe/spear being unused and the passage of time breaks down the connection to their axe_head/spear_tip?
Or do you mean them being worn away and eventually breaking after repeatedly using them for crafting/activity over time?
Or is it both?
Or is it something else?
AFAIK the only way to damage weapons is to use them to block attacks. Are there other ways they can be damaged?
Some scenarios (from most likely to least likely):
A spear losing its head while it is used to spear fish in shallow/deep water and while you are standing on land or on shallow water.
A spear/axe losing its head just as you finished making a hole in ice.
An axe losing its head while it is used to fell a tree while standing over shallow water.
Using a spear/axe to attack an entity that is standing on shallow water or swimming in deep water.
Throwing a spear/axe to attack an entity that is on shallow or deep water.
Is it possible to lose an axe_head/spear_tip during the above scenarios?