diff --git a/templates/workflow_template.py.j2 b/templates/workflow_template.py.j2
index dbd19dd..94f6345 100644
--- a/templates/workflow_template.py.j2
+++ b/templates/workflow_template.py.j2
@@ -111,7 +111,7 @@ class {{ workflow_class_name }}:
                     block_error = {
                         "code": type(e).__name__,
                         "description": str(e),
-                        "details": {}
+                        "details": {"cause": str(getattr(e, "cause", "No additional details"))}
                     }
                     workflow_output["status"] = "failed"
                 # Collect block output