diff --git a/src/app/db/models/custom_types.py b/src/app/db/models/custom_types.py
index 30530231..855ff4ea 100644
--- a/src/app/db/models/custom_types.py
+++ b/src/app/db/models/custom_types.py
@@ -100,4 +100,11 @@ def process_result_value(self, value, dialect):
             obj = Tool.from_dict(value)
             obj.certainty = Scale(obj.certainty) if obj.certainty else Scale.LOW
             return obj
+        elif value and isinstance(value, list):
+            objs = []
+            for item in value:
+                obj = Tool.from_dict(item)
+                obj.certainty = Scale(obj.certainty) if obj.certainty else Scale.LOW
+                objs.append(obj)
+            return objs
         return None