Avoid top-level composition in tool schemas

tests/test_data_agent_records.py

@@ -647,6 +647,17 @@ target: Agent(tag='地图导航')
         self.assertEqual(export_payload['record_count'], 1)
         self.assertTrue(table_exists)
 
+    def test_tool_schemas_avoid_top_level_composition_keywords(self) -> None:
+        # 部分 Bedrock/Anthropic 兼容后端不接受顶层 anyOf/oneOf/allOf。
+        blocked_keywords = {'anyOf', 'oneOf', 'allOf'}
+        violations = [
+            name
+            for name, tool in default_tool_registry().items()
+            if blocked_keywords.intersection(tool.parameters)
+        ]
+
+        self.assertEqual(violations, [])
+
     def test_data_agent_tools_route_relative_outputs_to_session_output(self) -> None:
         with tempfile.TemporaryDirectory() as tmp_dir:
             root = Path(tmp_dir)