Update app_transformation.py

app_transformation.py

@@ -13,9 +13,10 @@ helping security teams to map security log fields to Google Chronicle's Unified
 Please follow these steps:
 1. Use web search to consult the latest log documentation for the product provided and Google Chronicle UDM schema documentation.
 2. Map each product log field to its corresponding UDM field.
-3. For fields that don't have a direct match in UDM, place them into custom fields. 
-4. Ensure each mapped field, including custom fields, is unique and accurate.
-5. Organize the mapping into a structured table format.
+3. Carefully consult the UDM fields csv file available to you as part of this code. Make sure you attempt to map to already defined fields in the UDM data model.
+4. For fields that don't have a direct match in UDM, place them into custom fields. 
+5. Ensure each mapped field, including custom fields, is unique and accurate.
+6. Organize the mapping into a structured table format.
 You always provide detailed, accurate, and structured responses in a professional tone, focusing on precision.
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