Add a note stating that OpenTelemetry traces are subject to change

google/cloud/pubsub_v1/types.py

@@ -144,7 +144,14 @@ class SubscriberOptions(NamedTuple):
     """
 
     enable_open_telemetry_tracing: bool = False
-    """Whether to enable OpenTelemetry tracing."""
+    """
+    Whether to enable OpenTelemetry tracing.
+
+    Warning: traces are subject to change. The name and attributes of a span might
+    change without notice. Only use run traces interactively. Don't use in
+    automation. Running non-interactive traces can cause problems if the underlying
+    trace architecture changes without notice.
+    """
 
 
 # Define the default publisher options.
@@ -191,7 +198,14 @@ class PublisherOptions(NamedTuple):
     )
 
     enable_open_telemetry_tracing: bool = False  # disabled by default
-    """Open Telemetry tracing is enabled if this is set to True."""
+    """
+    Open Telemetry tracing is enabled if this is set to True.
+
+    Warning: traces are subject to change. The name and attributes of a span might
+    change without notice. Only use run traces interactively. Don't use in
+    automation. Running non-interactive traces can cause problems if the underlying
+    trace architecture changes without notice.
+    """
 
 
 # Define the type class and default values for flow control settings.