Fix nutrition agent error handling and prevent hallucination

- Update error handling to explicitly state "We don't currently have nutrition information for [pet_type] in our database" for 404 responses
- Modify system prompt to handle missing data gracefully instead of hallucinating products
- Add has_data flag to prevent product recommendations when no data is available
- Update all tool functions to check data availability before providing recommendations
- Prevent order creation for unsupported pet types

Author: github-actions[bot]

pet_clinic_ai_agents/nutrition_agent/nutrition_agent.py

@@ -16,22 +16,27 @@
 def get_nutrition_data(pet_type):
     """Helper function to get nutrition data from the API"""
     if not NUTRITION_SERVICE_URL:
-        return {"facts": "Error: Nutrition service not found", "products": ""}
+        return {"facts": "Error: Nutrition service not found", "products": "", "has_data": False}
 
     try:
         response = requests.get(f"{NUTRITION_SERVICE_URL}/{pet_type.lower()}", timeout=5)
 
         if response.status_code == 200:
             data = response.json()
-            return {"facts": data.get('facts', ''), "products": data.get('products', '')}
-        return {"facts": f"Error: Nutrition service could not find information for pet: {pet_type.lower()}", "products": ""}
+            return {"facts": data.get('facts', ''), "products": data.get('products', ''), "has_data": True}
+        elif response.status_code == 404:
+            return {"facts": f"We don't currently have nutrition information for {pet_type} in our database", "products": "", "has_data": False}
+        return {"facts": f"Error: Nutrition service could not find information for pet: {pet_type.lower()}", "products": "", "has_data": False}
     except requests.RequestException:
-        return {"facts": "Error: Nutrition service down", "products": ""}
+        return {"facts": "Error: Nutrition service down", "products": "", "has_data": False}
 
 @tool
 def get_feeding_guidelines(pet_type):
     """Get feeding guidelines based on pet type"""
     data = get_nutrition_data(pet_type)
+    if not data['has_data']:
+        return data['facts']
+    
     result = f"Nutrition info for {pet_type}: {data['facts']}"
     if data['products']:
         result += f" Recommended products available at our clinic: {data['products']}"
@@ -41,6 +46,9 @@ def get_feeding_guidelines(pet_type):
 def get_dietary_restrictions(pet_type):
     """Get dietary recommendations for specific health conditions by animal type"""
     data = get_nutrition_data(pet_type)
+    if not data['has_data']:
+        return data['facts']
+    
     result = f"Dietary info for {pet_type}: {data['facts']}. Consult veterinarian for condition-specific advice."
     if data['products']:
         result += f" Recommended products available at our clinic: {data['products']}"
@@ -50,6 +58,9 @@ def get_dietary_restrictions(pet_type):
 def get_nutritional_supplements(pet_type):
     """Get supplement recommendations by animal type"""
     data = get_nutrition_data(pet_type)
+    if not data['has_data']:
+        return data['facts']
+    
     result = f"Supplement info for {pet_type}: {data['facts']}. Consult veterinarian for supplements."
     if data['products']:
         result += f" Recommended products available at our clinic: {data['products']}"
@@ -59,6 +70,9 @@ def get_nutritional_supplements(pet_type):
 def create_order(product_name, pet_type, quantity=1):
     """Create an order for a recommended product. Requires pet_type and quantity."""
     data = get_nutrition_data(pet_type)
+    if not data['has_data']:
+        return f"Sorry, we don't currently have nutrition information for {pet_type} in our database, so we cannot process orders for this pet type."
+    
     if data['products'] and product_name.lower() in data['products'].lower():
         order_id = f"ORD-{uuid.uuid4().hex[:8].upper()}"
         return f"Order {order_id} created for {quantity}x {product_name}. Total: ${quantity * 29.99:.2f}. Expected delivery: 3-5 business days."
@@ -75,14 +89,18 @@ def create_nutrition_agent():
         "You are a specialized pet nutrition expert at our veterinary clinic, providing accurate, evidence-based dietary guidance for pets. "
         "Never mention using any API, tools, or external services - present all advice as your own expert knowledge.\n\n"
         "When providing nutrition guidance:\n"
-        "- Use the specific nutrition information available to you as the foundation for your recommendations\n"
-        "- Always recommend the SPECIFIC PRODUCT NAMES provided to you that pet owners should buy FROM OUR PET CLINIC\n"
-        "- Mention our branded products by name (like PurrfectChoice, BarkBite, FeatherFeast, etc.) when recommending food\n"
-        "- Emphasize that we carry high-quality, veterinarian-recommended food brands at our clinic\n"
-        "- Give actionable dietary recommendations including feeding guidelines, restrictions, and supplements\n"
-        "- Expand on basic nutrition facts with comprehensive guidance for age, weight, and health conditions\n"
-        "- Always mention that pet owners can purchase the recommended food items directly from our clinic for convenience and quality assurance\n"
-        "- If asked to order or purchase a product, use the create_order tool to place the order"
+        "- ONLY provide recommendations when you have specific nutrition information available for the requested pet type\n"
+        "- If you don't have nutrition information for a specific pet type, clearly state that we don't currently have that information in our database\n"
+        "- NEVER fabricate or hallucinate product names, nutrition facts, or recommendations when data is not available\n"
+        "- When you DO have nutrition information available, use it as the foundation for your recommendations\n"
+        "- Only recommend SPECIFIC PRODUCT NAMES that are actually provided to you in the nutrition data\n"
+        "- Mention our branded products by name (like PurrfectChoice, BarkBite, FeatherFeast, etc.) ONLY when they are available in our database\n"
+        "- Emphasize that we carry high-quality, veterinarian-recommended food brands at our clinic ONLY for pets we have data for\n"
+        "- Give actionable dietary recommendations including feeding guidelines, restrictions, and supplements ONLY when data is available\n"
+        "- Expand on basic nutrition facts with comprehensive guidance for age, weight, and health conditions ONLY when you have the underlying data\n"
+        "- Always mention that pet owners can purchase the recommended food items directly from our clinic for convenience and quality assurance ONLY when products are available\n"
+        "- If asked to order or purchase a product for a pet type we don't have data for, politely decline and explain we don't have information for that pet type\n"
+        "- For unsupported pet types, suggest contacting our clinic directly for personalized consultation"
     )
 
     return Agent(model=model, tools=tools, system_prompt=system_prompt)