[Feat] Update structured output error message (strands-agents#563)

* Update bedrock.py * Update anthropic.py
dbschmigelski · dbschmigelski · Jul 21, 2025 · Jul 22, 2025 · Jul 22, 2025 · Jul 22, 2025
commit bdc893bbae711c1af301e6f18901cb30814789a0
diff --git a/src/strands/models/anthropic.py b/src/strands/models/anthropic.py
@@ -414,7 +414,7 @@ async def structured_output(
         stop_reason, messages, _, _ = event["stop"]
 
         if stop_reason != "tool_use":
-            raise ValueError("No valid tool use or tool use input was found in the Anthropic response.")
+            raise ValueError(f"Model returned stop_reason: {stop_reason} instead of \"tool_use\".")
 
         content = messages["content"]
         output_response: dict[str, Any] | None = None

diff --git a/src/strands/models/bedrock.py b/src/strands/models/bedrock.py
@@ -584,7 +584,7 @@ async def structured_output(
         stop_reason, messages, _, _ = event["stop"]
 
         if stop_reason != "tool_use":
-            raise ValueError("No valid tool use or tool use input was found in the Bedrock response.")
+            raise ValueError(f"Model returned stop_reason: {stop_reason} instead of \"tool_use\".")
 
         content = messages["content"]
         output_response: dict[str, Any] | None = None