diff --git a/internal/multiagent/mcp_execution_binder_test.go b/internal/multiagent/mcp_execution_binder_test.go
index 47973194..e2f142fd 100644
--- a/internal/multiagent/mcp_execution_binder_test.go
+++ b/internal/multiagent/mcp_execution_binder_test.go
@@ -1,6 +1,10 @@
 package multiagent
 
-import "testing"
+import (
+	"fmt"
+	"sync"
+	"testing"
+)
 
 func TestMCPExecutionBinder(t *testing.T) {
 	b := NewMCPExecutionBinder()
@@ -12,3 +16,28 @@ func TestMCPExecutionBinder(t *testing.T) {
 		t.Fatalf("expected empty, got %q", got)
 	}
 }
+
+// TestMCPExecutionBinder_ConcurrentBind 回归并行 tool 回调不得 concurrent map panic。
+func TestMCPExecutionBinder_ConcurrentBind(t *testing.T) {
+	b := NewMCPExecutionBinder()
+	const workers = 64
+	var wg sync.WaitGroup
+	wg.Add(workers * 2)
+	for i := 0; i < workers; i++ {
+		i := i
+		toolCallID := fmt.Sprintf("call-%d", i)
+		execID := fmt.Sprintf("exec-%d", i)
+		go func() {
+			defer wg.Done()
+			b.Bind(toolCallID, execID)
+		}()
+		go func() {
+			defer wg.Done()
+			_ = b.ExecutionID(toolCallID)
+		}()
+	}
+	wg.Wait()
+	if got := b.ExecutionID("call-0"); got != "exec-0" {
+		t.Fatalf("expected exec-0, got %q", got)
+	}
+}