diff --git a/homeassistant/components/open_router/entity.py b/homeassistant/components/open_router/entity.py
index f97d0b142720..8613c5c9488b 100644
--- a/homeassistant/components/open_router/entity.py
+++ b/homeassistant/components/open_router/entity.py
@@ -109,7 +109,9 @@ def _convert_content_to_chat_message(
         return ChatCompletionToolMessageParam(
             role="tool",
             tool_call_id=content.tool_call_id,
-            content=json_dumps(content.tool_result),
+            content=json_dumps(
+                {"data": content.result.data, "error": content.result.error}
+            ),
         )
 
     role: Literal["user", "assistant", "system"] = content.role
diff --git a/tests/components/open_router/snapshots/test_conversation.ambr b/tests/components/open_router/snapshots/test_conversation.ambr
index d6e0c5508ddd..8abcb03249b2 100644
--- a/tests/components/open_router/snapshots/test_conversation.ambr
+++ b/tests/components/open_router/snapshots/test_conversation.ambr
@@ -262,7 +262,7 @@
       ]),
     }),
     dict({
-      'content': '{"speech":{"plain":{"speech":"12:00 PM","extra_data":null}},"response_type":"action_done","speech_slots":{"time":"12:00:00"},"data":{"success":[],"failed":[]}}',
+      'content': '{"data":{"speech":{"plain":{"speech":"12:00 PM","extra_data":null}},"response_type":"action_done","speech_slots":{"time":"12:00:00"},"data":{"success":[],"failed":[]}},"error":false}',
       'role': 'tool',
       'tool_call_id': 'mock_tool_call_id',
     }),
@@ -289,7 +289,7 @@
       ]),
     }),
     dict({
-      'content': '"value1"',
+      'content': '{"data":"value1","error":false}',
       'role': 'tool',
       'tool_call_id': 'call_call_1',
     }),