Address code review feedback

src/index.ts

@@ -131,8 +131,7 @@ export type GetInstanceConfigOperationsCallback = PagedCallback<
  * @property {google.spanner.v1.IDirectedReadOptions} [directedReadOptions] Sets the DirectedReadOptions for all ReadRequests and ExecuteSqlRequests for the Client.
  * Indicates which replicas or regions should be used for non-transactional reads or queries.
  * DirectedReadOptions won't be set for readWrite transactions"
- * @property {ObservabilityOptions} [observabilityOptions] defines the configuration
- * for OpenTelemetry Tracing.
+ * @property {ObservabilityOptions} [observabilityOptions] Sets the observability options to be used for OpenTelemetry tracing
  */
 export interface SpannerOptions extends GrpcClientOptions {
   apiEndpoint?: string;

src/instrument.ts

@@ -46,12 +46,12 @@ interface SQLStatement {
 }
 
 /*
- * ObservabilityOptions defines the configuration with which
- * startTrace may be invoked if set.
- * @property [tracerProvider] is the injected TracerProvider to use,
- * otherwise the global TracerProvider shall be used.
- * @property [enableExtendedTracing] when set signifies that spans started
- * with an accompanying an SQL statement shall be annotated with that SQL.
+ * ObservabilityOptions defines the configuration to be used for Spanner OpenTelemetry Traces.
+ * @property [tracerProvider] Sets the TracerProvider to be used for traces,
+ * Global TracerProvider will be used as a fallback.
+ * @property [enableExtendedTracing] Sets whether to enable extended OpenTelemetry tracing. Enabling this option will add the
+ * following additional attributes to the traces that are generated by the client
+ * db.statement: Contains the SQL statement that is being executed.
  * Alternatively, you could set environment variable `SPANNER_ENABLE_EXTENDED_TRACING=true`.
  */
 interface ObservabilityOptions {