{"ok": true, "tool": "get_variable_metadata", "variable": {"variable_id": "var_0112", "index": 112, "variable_name": "地方财政一般预算内收入", "column_name": "财政_CCSY_地方财政一般预算内收入", "original_variable_name": "财政_地方财政一般预算内收入（万元）", "source": "《中国城市统计年鉴》", "category": "财政", "unit": "万元", "years": "1984-2024", "year_start": 1984, "year_end": 2024, "city_count": 298, "sample_size": 9582, "dataset_version": "1.0", "generated_date": "2026-07-08", "citation_note": "使用时请注明数据来源为“中国城市政治经济数据库”，版本 1.0。"}}