When do you use clinical decision tools, like HERDOO2 or DASH, to determine duration of anticoagulation in venous thromboembolism?

When are clinical decision tools most helpful in determining duration of anticoagulation in venous thromboembolism?

• Patients with significant bleeding risk/history
• Patient disinterested in continuing anticoagulation therapy
• Unclear risk factors for thrombosis
• I rarely use clinical decision making tools and go based on history (provoking risk factors, unprovoked VTE)
• Other