diff --git a/internal/llminternal/functions.go b/internal/llminternal/functions.go
index b1771bdea..6c39c2b83 100644
--- a/internal/llminternal/functions.go
+++ b/internal/llminternal/functions.go
@@ -15,8 +15,6 @@
 package llminternal
 
 import (
-	"time"
-
 	"google.golang.org/genai"
 
 	"google.golang.org/adk/agent"
@@ -78,18 +76,15 @@ func generateRequestConfirmationEvent(
 		return nil
 	}
 
-	return &session.Event{
-		InvocationID: invocationContext.InvocationID(),
-		Author:       invocationContext.Agent().Name(),
-		Branch:       invocationContext.Branch(),
-		LLMResponse: model.LLMResponse{
-			Content: &genai.Content{
-				Parts: parts,
-				Role:  genai.RoleModel,
-			},
+	event := session.NewEvent(invocationContext.InvocationID())
+	event.Author = invocationContext.Agent().Name()
+	event.Branch = invocationContext.Branch()
+	event.LLMResponse = model.LLMResponse{
+		Content: &genai.Content{
+			Parts: parts,
+			Role:  genai.RoleModel,
 		},
-		Timestamp:          time.Now(),
-		LongRunningToolIDs: longRunningToolIDs,
-		Actions:            session.EventActions{},
 	}
+	event.LongRunningToolIDs = longRunningToolIDs
+	return event
 }
diff --git a/internal/llminternal/functions_test.go b/internal/llminternal/functions_test.go
index 63aa27169..0db69fc59 100644
--- a/internal/llminternal/functions_test.go
+++ b/internal/llminternal/functions_test.go
@@ -146,6 +146,7 @@ func TestGenerateRequestConfirmationEvent(t *testing.T) {
 				InvocationID: "inv_1",
 				Author:       "agent_1",
 				Branch:       "main",
+				Actions:      session.EventActions{StateDelta: map[string]any{}},
 				LLMResponse: model.LLMResponse{
 					Content: &genai.Content{
 						Role: genai.RoleModel,
@@ -180,6 +181,12 @@ func TestGenerateRequestConfirmationEvent(t *testing.T) {
 			}
 
 			if got != nil {
+				if got.ID == "" {
+					t.Errorf("expected event ID to be set, got empty string")
+				}
+				if got.Timestamp.IsZero() {
+					t.Errorf("expected event Timestamp to be set, got zero value")
+				}
 				for _, s := range got.LongRunningToolIDs {
 					if s == "" {
 						t.Errorf("empty long running tool id")