- Rename email_list_inbox → email_list_folder (works on any folder, not just inbox)
- email_list_folder / email_search: distinguish browse-by-recency vs filter-by-query
- email_move / email_delete: clarify single-email scope; point to email_bulk_action for multiple
- email_bulk_action: clarify it handles multiple emails; point to move/delete for single
- email_create_folder: remove redundant "ask user" instruction (requires_approval handles it)
- Update tests to reflect renamed tool
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>