feat(tools/basic): 内置基础工具（calculator(注入安全)/datetime/random/text/json/markdown）+ 批量注册

plugins/tools/basic/context_test.go

@@ -0,0 +1,25 @@
+package basic
+
+import (
+	"context"
+	"errors"
+	"testing"
+)
+
+// TestExecute_HonorsCancellation verifies every tool returns the context error
+// when ctx is already canceled, without performing any work.
+func TestExecute_HonorsCancellation(t *testing.T) {
+	t.Parallel()
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+	for _, tool := range Tools() {
+		tool := tool
+		t.Run(tool.Name(), func(t *testing.T) {
+			t.Parallel()
+			_, err := tool.Execute(ctx, map[string]any{})
+			if !errors.Is(err, context.Canceled) {
+				t.Fatalf("err = %v, want wrapping context.Canceled", err)
+			}
+		})
+	}
+}