diff --git a/CHANGELOG.md b/CHANGELOG.md
index e06aa4c6de..33ccbc3d5f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 - `Workflow` threads not being properly cleaned up after completion.
+- Crash when `ToolAction`s were missing output due to an `ActionsSubtask` exception.
 
 ## [0.29.1] - 2024-08-02
 
diff --git a/griptape/tasks/toolkit_task.py b/griptape/tasks/toolkit_task.py
index 59d8f9f90d..4d6d27323f 100644
--- a/griptape/tasks/toolkit_task.py
+++ b/griptape/tasks/toolkit_task.py
@@ -83,7 +83,7 @@ def prompt_stack(self) -> PromptStack:
                         for action in s.actions
                     ]
                     action_results = [
-                        ToolAction(name=action.name, path=action.path, tag=action.tag, output=action.output)
+                        ToolAction(name=action.name, path=action.path, tag=action.tag, output=action.output or s.output)
                         for action in s.actions
                     ]