diff --git a/dspy/clients/lm.py b/dspy/clients/lm.py
index 66cd7ea2cb..931540fa7e 100644
--- a/dspy/clients/lm.py
+++ b/dspy/clients/lm.py
@@ -123,6 +123,7 @@ def __call__(self, prompt=None, messages=None, **kwargs):
             timestamp=datetime.now().isoformat(),
             uuid=str(uuid.uuid4()),
             model=self.model,
+            response_model=response["model"],
             model_type=self.model_type,
         )
         self.history.append(entry)
diff --git a/dspy/predict/react.py b/dspy/predict/react.py
index 2690d066af..8c61f2b5f9 100644
--- a/dspy/predict/react.py
+++ b/dspy/predict/react.py
@@ -68,9 +68,18 @@ def __init__(self, signature, tools: list[Callable], max_iters=5):
         react_signature = (
             dspy.Signature({**signature.input_fields}, "\n".join(instr))
             .append("trajectory", dspy.InputField(), type_=str)
-            .append("next_thought", dspy.OutputField(), type_=str)
-            .append("next_tool_name", dspy.OutputField(), type_=Literal[tuple(tools.keys())])
-            .append("next_tool_args", dspy.OutputField(), type_=dict[str, Any])
+            .append("next_thought", dspy.OutputField(
+                desc="The next thought to consider in the trajectory."
+                     " Make sure the key is exactly 'next_thought'"
+            ), type_=str)
+            .append("next_tool_name", dspy.OutputField(
+                desc="The next tool to use in the trajectory."
+                     " Make sure the key is exactly 'next_tool_name'"
+            ), type_=Literal[tuple(tools.keys())])
+            .append("next_tool_args", dspy.OutputField(
+                desc="The arguments to pass to the next tool in the trajectory."
+                     " Make sure the key is exactly 'next_tool_args'"
+            ), type_=dict[str, Any])
         )
 
         fallback_signature = dspy.Signature(