Tools form distinct groups: search (get_stats_list, search_stats_by_keyword), metadata (get_meta_info, get_data_catalog), data retrieval (get_stats_data, get_stats_data_bulk). However, CSV variants (get_stats_list_csv, get_meta_info_csv, get_stats_data_csv, get_data_catalog_csv) overlap with their JSON counterparts, though descriptions clarify the difference. The helper tools search_stats_by_keyword and the CSV variants could confuse agents if not careful.

Most tools follow a consistent get_<resource> pattern (e.g., get_stats_list, get_meta_info, get_stats_data). The main deviation is search_stats_by_keyword, which uses 'search' instead of 'get'. The CSV variants consistently append '_csv', which is clear. Minor inconsistency but overall predictable.

13 tools is within the ideal 3-15 range, slightly on the higher side but justified by the domain (search, metadata, data retrieval, catalog). The presence of CSV variants for each endpoint adds 4 extra tools, which could be seen as moderate over-scoping, but they serve a real need for agents preferring CSV output. Overall appropriate.

The tool surface covers core e-Stat API operations: searching stats tables, retrieving metadata, fetching stats data, and bulk retrieval. It also includes a post_dataset for registration. However, there is no update or delete operation for datasets, and the search functionality is somewhat split between get_stats_list and search_stats_by_keyword, which may lead to dead ends. The data catalog endpoints are a plus, but the lack of explicit lifecycle management (update/delete) is a notable gap.