zirain

/ok-to-test

will `sidecar.istio.io/proxyImage` annotation help you?

is [this](https://istio.io/latest/docs/tasks/observability/metrics/customize-metrics/#use-expressions-for-values) what you want?

does envoy support HELP text?

IIRC, envoy don't support HELP text, so I'm not sure what can istio do.

@ymesika where did you got that error message? I didn't see that with prometheus.

@ymesika you're using something like otel-collector with a pipeline `prometheus receiver -> other components -> prometheus exporter`?

I think this's edge case about prometheus, this won't happen with https://github.com/prometheus/client_golang. Remove the help text in istiod will fixed the issue, but in a bad way.

Alternative: 1. moving the metric from proxy to istio-agent 2. envoy support help text

not stale