Python: Bug: gen_ai.content.prompt missing in trace events in Aspire Dashboard

[mc-marcocheng]

Describe the bug
Unable to find gen_ai.content.prompt event in Aspire Dashboard, which is mentioned in the Advanced telemetry with Sementic Kernel tutorial. This field is essential for debugging.

To Reproduce
Steps to reproduce the behavior:

1. Setup Aspire Dashboard with Docker.
2. Use the Python script in https://learn.microsoft.com/en-us/semantic-kernel/concepts/enterprise-readiness/observability/telemetry-advanced?tabs=Powershell&pivots=programming-language-python
3. Setup environment variables for AzureChatCompletion.
4. Run the script.
5. Check the trace in Aspire Dashboard.

Expected behavior
Able to see chat message history in Aspire Dashboard.

Screenshots

Platform

• Language: Python 3.10.13
• Source: Aspire Dashboard 9.1, Semantic Kernel 1.28.1, Opentelemetry SDK 1.32.1
• OS: Windows