diff --git a/modules/client-common/src/main/java/org/apache/ignite/internal/jdbc/proto/event/JdbcObservableTimeAwareRequest.java b/modules/client-common/src/main/java/org/apache/ignite/internal/jdbc/proto/event/JdbcObservableTimeAwareRequest.java
index ef08443baf0..23ec5f3e20f 100644
--- a/modules/client-common/src/main/java/org/apache/ignite/internal/jdbc/proto/event/JdbcObservableTimeAwareRequest.java
+++ b/modules/client-common/src/main/java/org/apache/ignite/internal/jdbc/proto/event/JdbcObservableTimeAwareRequest.java
@@ -23,11 +23,11 @@
  * An extension to JDBC request that provides the ability to update and read client observable time.
  */
 abstract class JdbcObservableTimeAwareRequest {
-    /** Holds the latest time observed by client. */
+    /** Tracker of the latest time observed by client. */
     @SuppressWarnings("TransientFieldInNonSerializableClass")
     private final transient HybridTimestampTracker timestampTracker = HybridTimestampTracker.atomicTracker(null);
 
-    /** Returns the holder with the latest time observed by client. */
+    /** Returns the tracker of the latest time observed by client. */
     public HybridTimestampTracker timestampTracker() {
         return timestampTracker;
     }
diff --git a/modules/client-handler/src/main/java/org/apache/ignite/client/handler/ClientInboundMessageHandler.java b/modules/client-handler/src/main/java/org/apache/ignite/client/handler/ClientInboundMessageHandler.java
index fb7b6eeef45..889833c8998 100644
--- a/modules/client-handler/src/main/java/org/apache/ignite/client/handler/ClientInboundMessageHandler.java
+++ b/modules/client-handler/src/main/java/org/apache/ignite/client/handler/ClientInboundMessageHandler.java
@@ -817,6 +817,7 @@ private void processOperation(ChannelHandlerContext ctx, ClientMessageUnpacker i
             case ClientOp.SQL_EXEC_SCRIPT:
                 return ClientSqlExecuteScriptRequest.process(in, queryProcessor).thenRun(() -> {
                     if (out.meta() == null) {
+                        // TODO https://issues.apache.org/jira/browse/IGNITE-24275 Must set updated time instead of current time.
                         out.meta(clockService.current());
                     }
                 });
diff --git a/modules/client-handler/src/main/java/org/apache/ignite/client/handler/requests/jdbc/ClientJdbcFinishTxRequest.java b/modules/client-handler/src/main/java/org/apache/ignite/client/handler/requests/jdbc/ClientJdbcFinishTxRequest.java
index 7aeb903b3c0..b04586c091c 100644
--- a/modules/client-handler/src/main/java/org/apache/ignite/client/handler/requests/jdbc/ClientJdbcFinishTxRequest.java
+++ b/modules/client-handler/src/main/java/org/apache/ignite/client/handler/requests/jdbc/ClientJdbcFinishTxRequest.java
@@ -43,9 +43,7 @@ public static CompletableFuture<Void> process(
         boolean commit = in.unpackBoolean();
 
         return handler.finishTxAsync(connectionId, commit).thenAccept(res -> {
-            if (commit) {
-                out.meta(res.observableTime());
-            }
+            out.meta(res.observableTime());
 
             res.writeBinary(out);
         });
diff --git a/modules/client-handler/src/main/java/org/apache/ignite/client/handler/requests/sql/ClientSqlExecuteScriptRequest.java b/modules/client-handler/src/main/java/org/apache/ignite/client/handler/requests/sql/ClientSqlExecuteScriptRequest.java
index 4652e8a4598..a242591f047 100644
--- a/modules/client-handler/src/main/java/org/apache/ignite/client/handler/requests/sql/ClientSqlExecuteScriptRequest.java
+++ b/modules/client-handler/src/main/java/org/apache/ignite/client/handler/requests/sql/ClientSqlExecuteScriptRequest.java
@@ -49,6 +49,7 @@ public static CompletableFuture<Void> process(
             arguments = ArrayUtils.OBJECT_EMPTY_ARRAY;
         }
 
+        // TODO https://issues.apache.org/jira/browse/IGNITE-24275 Script must return updated time to client.
         HybridTimestamp clientTs = HybridTimestamp.nullableHybridTimestamp(in.unpackLong());
         var tsUpdater = HybridTimestampTracker.clientTracker(clientTs, ts -> {});
 
diff --git a/modules/transactions/src/main/java/org/apache/ignite/internal/tx/InternalTransaction.java b/modules/transactions/src/main/java/org/apache/ignite/internal/tx/InternalTransaction.java
index 75a2b42ad42..ed50e6527c5 100644
--- a/modules/transactions/src/main/java/org/apache/ignite/internal/tx/InternalTransaction.java
+++ b/modules/transactions/src/main/java/org/apache/ignite/internal/tx/InternalTransaction.java
@@ -92,9 +92,9 @@ public interface InternalTransaction extends Transaction {
     HybridTimestamp startTimestamp();
 
     /**
-     * Returns observable timestamp.
+     * Returns an observable timestamp provided by the observable timestamp tracker.
      *
-     * @return observable timestamp.
+     * @return observable timestamp, or {@code null} if the observable time has not yet been initialized/updated.
      */
     @Nullable HybridTimestamp observableTimestamp();