diff --git a/pkg/agent/loop.go b/pkg/agent/loop.go
index 89037d8dc..2117e2f39 100644
--- a/pkg/agent/loop.go
+++ b/pkg/agent/loop.go
@@ -584,6 +584,16 @@ func (al *AgentLoop) llmWorker(ctx context.Context, queue <-chan bus.InboundMess
 			return
 		}
 
+		// Reset per-round message-tool state so a previous round's
+		// tool-sent flag does not suppress this round's response.
+		if defaultAgent := al.registry.GetDefaultAgent(); defaultAgent != nil {
+			if tool, ok := defaultAgent.Tools.Get("message"); ok {
+				if mt, ok := tool.(*tools.MessageTool); ok {
+					mt.ResetSentInRound()
+				}
+			}
+		}
+
 		response, err := al.processMessage(ctx, msg)
 		if err != nil {
 			response = fmt.Sprintf("Error processing message: %v", err)
diff --git a/pkg/tools/message_test.go b/pkg/tools/message_test.go
index 05630972e..abd34448a 100644
--- a/pkg/tools/message_test.go
+++ b/pkg/tools/message_test.go
@@ -252,3 +252,29 @@ func TestMessageTool_Parameters(t *testing.T) {
 		t.Error("Expected chat_id type to be 'string'")
 	}
 }
+
+func TestMessageTool_ResetSentInRound(t *testing.T) {
+	tool := NewMessageTool()
+	tool.SetSendCallback(func(channel, chatID, content string) error {
+		return nil
+	})
+
+	ctx := WithToolContext(context.Background(), "ch", "cid")
+
+	// First round: tool sends a message
+	tool.Execute(ctx, map[string]any{"content": "hello"})
+	if !tool.HasSentInRound() {
+		t.Fatal("expected sentInRound=true after Execute")
+	}
+
+	// Reset for second round
+	tool.ResetSentInRound()
+	if tool.HasSentInRound() {
+		t.Fatal("expected sentInRound=false after ResetSentInRound")
+	}
+
+	// Second round: tool is NOT used (direct answer) → flag stays false
+	if tool.HasSentInRound() {
+		t.Error("expected sentInRound=false when tool was not used in this round")
+	}
+}