fix: keep approval batching internal

test/bridge.test.ts

@@ -193,7 +193,7 @@ test("MCP approval_login returns both portable text and a standard resource link
     assert.equal((history.inputSchema as any).properties.endDate.default, "");
     const batch = tools.tools.find((tool) => tool.name === "approval_process_batch")!;
     assert.equal((batch.inputSchema as any).properties.items.maxItems, 20);
-    assert.match(batch.description ?? "", /最多 20 条.*零写入/s);
+    assert.match(batch.description ?? "", /Schema容量.*不向用户解释.*任一无效则零写入/s);
   } finally {
     await client.close();
     await server.close();