Address Greptile / coderabbit feedback

Author: tgasser-nv

docs/configure-rails/yaml-schema/tracing-configuration.md

@@ -49,7 +49,7 @@ tracing:
 | `enabled` | Enable or disable tracing | `false` |
 | `adapters` | List of tracing adapters | `[]` |
 | `span_format` | Span structure used by the LLMRails adapter: `opentelemetry` or `legacy` | `opentelemetry` |
-| `enable_content_capture` | Record prompts, responses, and rail inputs on spans. Captures potentially sensitive data (PII); see [](../../observability/tracing/content-capture.md) | `false` |
+| `enable_content_capture` | Record prompts and responses on spans. Captures potentially sensitive data (PII); see [](../../observability/tracing/content-capture.md) for full behavior and engine-specific differences | `false` |
 
 ## Tracing Adapters
 

docs/observability/tracing/content-capture.md

@@ -57,6 +57,8 @@ Content is only captured when tracing is also enabled — there is no point reco
 
 ### Environment Variable Override
 
+*Applies to the IORails engine only — see [Engine Support](#engine-support) below.*
+
 The `OTEL_INSTRUMENTATION_GENAI_CAPTURE_MESSAGE_CONTENT` environment variable overrides the config field in **both** directions.
 This gives operators a single OpenTelemetry-standard switch to flip capture across all services, regardless of what each deployed `config.yml` says.
 
@@ -70,6 +72,8 @@ Values are case-insensitive, and surrounding whitespace is ignored.
 
 ## Output Format
 
+*Applies to the IORails engine only — see [Engine Support](#engine-support) below.*
+
 Captured content is emitted in one of two forms, selected by the `OTEL_SEMCONV_STABILITY_OPT_IN` environment variable.
 This variable holds a comma-separated list of opt-in tokens.