docs(openai-agents): explain message capture environment options

Author: nagkumar91

instrumentation-genai/opentelemetry-instrumentation-openai-agents/examples/manual/.env.example

@@ -9,3 +9,6 @@ OTEL_SERVICE_NAME=opentelemetry-python-openai-agents-manual
 
 # Optionally override the agent name reported on spans
 # OTEL_GENAI_AGENT_NAME=Travel Concierge
+
+# Set to ``no_content`` to opt out of capturing prompts and completions
+# OTEL_INSTRUMENTATION_GENAI_CAPTURE_MESSAGE_CONTENT=no_content

instrumentation-genai/opentelemetry-instrumentation-openai-agents/examples/manual/README.rst

@@ -40,3 +40,10 @@ values exported.
 
 You should see the agent response printed to the console while spans export to
 your configured observability backend.
+
+By default the instrumentation records prompts, responses, and tool payloads
+in both span attributes and events
+(``OTEL_INSTRUMENTATION_GENAI_CAPTURE_MESSAGE_CONTENT=span_and_event``). Set
+the variable to ``span_only`` or ``event_only`` to limit capture to a single
+signal, or to ``no_content`` to opt out entirely before running the sample.
+Boolean strings such as ``true``/``false`` are also accepted.

instrumentation-genai/opentelemetry-instrumentation-openai-agents/examples/zero-code/.env.example

@@ -10,5 +10,8 @@ OTEL_SERVICE_NAME=opentelemetry-python-openai-agents-zero-code
 # Enable auto-instrumentation for logs if desired
 OTEL_PYTHON_LOGGING_AUTO_INSTRUMENTATION_ENABLED=true
 
+# Set to ``no_content`` to opt out of capturing prompts and completions
+# OTEL_INSTRUMENTATION_GENAI_CAPTURE_MESSAGE_CONTENT=no_content
+
 # Optionally override the agent name reported on spans
 # OTEL_GENAI_AGENT_NAME=Travel Concierge

instrumentation-genai/opentelemetry-instrumentation-openai-agents/examples/zero-code/README.rst

@@ -39,3 +39,9 @@ also works when the required environment variables are already exported.
 
 You should see the agent response printed to the console while spans export to
 your observability backend.
+
+Prompts, completions, and tool payloads are captured by default in both span
+attributes and events. Set ``OTEL_INSTRUMENTATION_GENAI_CAPTURE_MESSAGE_CONTENT``
+to ``span_only`` or ``event_only`` to narrow the capture, or to ``no_content``
+to suppress content entirely for this example. Boolean strings such as
+``true``/``false`` are also accepted.