Tree pruning is for owners who want to retain a tree while addressing a defined issue such as deadwood, roof clearance, path clearance, a damaged branch or developing structure. A request to trim everything back gives no useful instruction about which branches matter or what form should remain. First contact should show the whole canopy, the target area below it and the point where clearance is needed. It should also say what the owner wants to preserve, because a clearance job and a structural pruning job are not the same operation.
The eventual provider should explain the pruning objective, parts of the canopy involved, likely limitations and what will be removed from site. Protected-tree rules may still apply to major pruning, while current City Services guidance includes specific treatment of minor pruning and registered trees. No pruning method can guarantee that every future limb failure is prevented. The practical goal is a reasoned scope with selected cuts, evidence and expectations that match the tree and site.