diff --git a/server/src/main/java/org/elasticsearch/action/admin/cluster/repositories/delete/TransportDeleteRepositoryAction.java b/server/src/main/java/org/elasticsearch/action/admin/cluster/repositories/delete/TransportDeleteRepositoryAction.java
index 6c6723a25a201..9d4a7280c4120 100644
--- a/server/src/main/java/org/elasticsearch/action/admin/cluster/repositories/delete/TransportDeleteRepositoryAction.java
+++ b/server/src/main/java/org/elasticsearch/action/admin/cluster/repositories/delete/TransportDeleteRepositoryAction.java
@@ -95,7 +95,7 @@ protected void validateForReservedState(DeleteRepositoryRequest request, Cluster
             ProjectStateRegistry.get(state).reservedStateMetadata(projectResolver.getProjectId()).values(),
             reservedStateHandlerName().get(),
             modifiedKeys(request),
-            request.toString()
+            request::toString
         );
     }
 }
diff --git a/server/src/main/java/org/elasticsearch/action/admin/indices/template/delete/TransportDeleteComposableIndexTemplateAction.java b/server/src/main/java/org/elasticsearch/action/admin/indices/template/delete/TransportDeleteComposableIndexTemplateAction.java
index 35e44d9a67b20..100de70420fbc 100644
--- a/server/src/main/java/org/elasticsearch/action/admin/indices/template/delete/TransportDeleteComposableIndexTemplateAction.java
+++ b/server/src/main/java/org/elasticsearch/action/admin/indices/template/delete/TransportDeleteComposableIndexTemplateAction.java
@@ -99,7 +99,7 @@ protected void validateForReservedState(Request request, ClusterState state) {
             ProjectStateRegistry.get(state).reservedStateMetadata(projectResolver.getProjectId()).values(),
             reservedStateHandlerName().get(),
             modifiedKeys(request),
-            request.toString()
+            request::toString
         );
     }
 
diff --git a/server/src/main/java/org/elasticsearch/action/admin/indices/template/put/TransportPutComponentTemplateAction.java b/server/src/main/java/org/elasticsearch/action/admin/indices/template/put/TransportPutComponentTemplateAction.java
index ecd928a1bb5b6..e7cdf2f7c872f 100644
--- a/server/src/main/java/org/elasticsearch/action/admin/indices/template/put/TransportPutComponentTemplateAction.java
+++ b/server/src/main/java/org/elasticsearch/action/admin/indices/template/put/TransportPutComponentTemplateAction.java
@@ -134,7 +134,7 @@ protected void validateForReservedState(PutComponentTemplateAction.Request reque
             ProjectStateRegistry.get(state).reservedStateMetadata(projectResolver.getProjectId()).values(),
             reservedStateHandlerName().get(),
             modifiedKeys(request),
-            request.toString()
+            request::toString
         );
     }
 }
diff --git a/server/src/main/java/org/elasticsearch/action/admin/indices/template/put/TransportPutComposableIndexTemplateAction.java b/server/src/main/java/org/elasticsearch/action/admin/indices/template/put/TransportPutComposableIndexTemplateAction.java
index 2ca82a3ddbd68..20a57221a3c2e 100644
--- a/server/src/main/java/org/elasticsearch/action/admin/indices/template/put/TransportPutComposableIndexTemplateAction.java
+++ b/server/src/main/java/org/elasticsearch/action/admin/indices/template/put/TransportPutComposableIndexTemplateAction.java
@@ -145,7 +145,7 @@ protected void validateForReservedState(Request request, ClusterState state) {
             ProjectStateRegistry.get(state).reservedStateMetadata(projectResolver.getProjectId()).values(),
             reservedStateHandlerName().get(),
             modifiedKeys(request),
-            request.toString()
+            request::toString
         );
     }
 
diff --git a/server/src/main/java/org/elasticsearch/action/ingest/PutPipelineTransportAction.java b/server/src/main/java/org/elasticsearch/action/ingest/PutPipelineTransportAction.java
index 5f2fac1e079c4..d21cc684a41e8 100644
--- a/server/src/main/java/org/elasticsearch/action/ingest/PutPipelineTransportAction.java
+++ b/server/src/main/java/org/elasticsearch/action/ingest/PutPipelineTransportAction.java
@@ -84,7 +84,7 @@ protected void validateForReservedState(PutPipelineRequest request, ClusterState
             ProjectStateRegistry.get(state).reservedStateMetadata(projectResolver.getProjectId()).values(),
             reservedStateHandlerName().get(),
             modifiedKeys(request),
-            request.toString()
+            request::toString
         );
     }
 }
diff --git a/server/src/main/java/org/elasticsearch/action/support/ReservedStateAwareHandledTransportAction.java b/server/src/main/java/org/elasticsearch/action/support/ReservedStateAwareHandledTransportAction.java
index f9a15c6bf8a64..58fbb9c391bb6 100644
--- a/server/src/main/java/org/elasticsearch/action/support/ReservedStateAwareHandledTransportAction.java
+++ b/server/src/main/java/org/elasticsearch/action/support/ReservedStateAwareHandledTransportAction.java
@@ -53,7 +53,7 @@ protected void doExecute(Task task, Request request, ActionListener<Response> li
             clusterService.state().metadata().reservedStateMetadata().values(),
             reservedStateHandlerName().get(),
             modifiedKeys(request),
-            request.toString()
+            request::toString
         );
         doExecuteProtected(task, request, listener);
     }
diff --git a/server/src/main/java/org/elasticsearch/action/support/master/TransportMasterNodeAction.java b/server/src/main/java/org/elasticsearch/action/support/master/TransportMasterNodeAction.java
index c505fe95ce76d..44545edba9b1f 100644
--- a/server/src/main/java/org/elasticsearch/action/support/master/TransportMasterNodeAction.java
+++ b/server/src/main/java/org/elasticsearch/action/support/master/TransportMasterNodeAction.java
@@ -143,7 +143,7 @@ protected void validateForReservedState(Request request, ClusterState state) {
             state.metadata().reservedStateMetadata().values(),
             handlerName.get(),
             modifiedKeys(request),
-            request.toString()
+            request::toString
         );
     }
 
diff --git a/server/src/main/java/org/elasticsearch/reservedstate/ActionWithReservedState.java b/server/src/main/java/org/elasticsearch/reservedstate/ActionWithReservedState.java
index a9f2cdf3b7716..a1bb8eafaabd9 100644
--- a/server/src/main/java/org/elasticsearch/reservedstate/ActionWithReservedState.java
+++ b/server/src/main/java/org/elasticsearch/reservedstate/ActionWithReservedState.java
@@ -17,6 +17,7 @@
 import java.util.List;
 import java.util.Optional;
 import java.util.Set;
+import java.util.function.Supplier;
 
 import static org.elasticsearch.core.Strings.format;
 
@@ -53,13 +54,13 @@ default Set<String> modifiedKeys(T request) {
      * @param reservedStateMetadata the metadata to check
      * @param handlerName the name of the reserved state handler related to this implementation
      * @param modified the set of modified keys by the related request
-     * @param request a string representation of the request for error reporting purposes
+     * @param requestSupplier a supplier for a string representation of the request for error reporting purposes
      */
     default void validateForReservedState(
         Collection<ReservedStateMetadata> reservedStateMetadata,
         String handlerName,
         Set<String> modified,
-        String request
+        Supplier<String> requestSupplier
     ) {
         List<String> errors = new ArrayList<>();
 
@@ -72,7 +73,7 @@ default void validateForReservedState(
 
         if (errors.isEmpty() == false) {
             throw new IllegalArgumentException(
-                format("Failed to process request [%s] with errors: [%s]", request, String.join(", ", errors))
+                format("Failed to process request [%s] with errors: [%s]", requestSupplier.get(), String.join(", ", errors))
             );
         }
     }
diff --git a/server/src/test/java/org/elasticsearch/action/admin/indices/template/reservedstate/ReservedComposableIndexTemplateActionTests.java b/server/src/test/java/org/elasticsearch/action/admin/indices/template/reservedstate/ReservedComposableIndexTemplateActionTests.java
index 8513cf5eff45f..828f3147d0306 100644
--- a/server/src/test/java/org/elasticsearch/action/admin/indices/template/reservedstate/ReservedComposableIndexTemplateActionTests.java
+++ b/server/src/test/java/org/elasticsearch/action/admin/indices/template/reservedstate/ReservedComposableIndexTemplateActionTests.java
@@ -963,7 +963,7 @@ public void testTemplatesWithReservedPrefix() throws Exception {
                     withReservedState.reservedStateMetadata(projectId).values(),
                     ReservedComposableIndexTemplateAction.NAME,
                     modifiedKeys,
-                    pr.name()
+                    pr::name
                 )
             ).getMessage()
         );
@@ -979,7 +979,7 @@ public void testTemplatesWithReservedPrefix() throws Exception {
             withReservedState.reservedStateMetadata(projectId).values(),
             ReservedComposableIndexTemplateAction.NAME,
             modifiedKeysOK,
-            prOK.name()
+            prOK::name
         );
     }