Hi @Amit Naik1 

The Description field is included in the Case Summarization feature out of the box.

To verify this:

1. Navigate to
   All → Now Assist Admin → Features
2. Under the Employee category, open HRSD
3. Open the Case Summarization feature from the available cards under case
4. Open the related prompt/template configuration
5. Check the Inputs section

You can see that the Description field is already included in the prompt template when the case state is Work in Progress.

Hope that Helps!