Wouldn't a fair criticism of OTEL be that you only see what these harnesses are willing to show you?
There have been numerous scandals of AI companies offering CC/cursor alternatives, then indexing data they never should have; specifically Z.ai [0], ByteDance Trae [1] and Alibaba Qwen [2]. Maybe the argument should be that all harnesses should be sandboxed and monitored for all networking.
If it were me, all AI harnesses would be running on a VM with network logging enabled. Beyond not being able to trust what data they send via the harness, you should audit what data they access.
[0] https://www.chosun.com/english/industry-en/2026/09/22/ABYLC3...
[1] https://github.com/segmentationf4u1t/trae_telemetry_research