Building in rust, particularly deleting walls in rust can be frustrating at times. I know you’re given a short time after creating a wall or structure to be able to delete it but adding on or modifying an existing structure just cant happen unless you spend an absurd amount of resources (c4) to move walls around. I was told by players in game, and it makes sense its because that if a raider is able to get building access fp didnt want people to be able to just delete walls to assist in raiding. My suggestion would be to increase the health of the toolcab, or make them extremely hard to destroy. Usually theyre not needed to be destroyed or moved anyway. Along with that the tool cabinet always remembers the original builder (of that cabinet). He, and he alone can delete structures for the life of the cabinet so long as he has access granted.
the only possible problem i see with this is if someone gets raided and someone new takes over their base. the original owner can raid back his base and if able to secure building access again he can delete walls to access possibly new loot rooms added.