Update app.py

app.py

@@ -587,12 +587,13 @@ Try DIFFERENT approach now."""
         raise
 
 
-class ValidateInput(BaseModel):
+class ValidateAnswerInput(BaseModel):
     proposed_answer: str = Field(description="Answer to validate")
     original_question: str = Field(description="Original question (first 100 chars)")
 
 @tool(args_schema=ValidateAnswerInput)
-def validate_answer(answer: str) -> str:
+def validate_answer(proposed_answer: str, original_question: str = "") -> str:
+
     """
     Validate answer format and provide warnings.
     Returns validation result with normalization suggestions.