Scored across 26 tools
Each tool has a clearly distinct purpose: block operations, sheet operations, workbook operations, analysis tools, chart tools, and metadata. Even similar-sounding tools like set_cells vs set_block_cells are explicitly differentiated by whether they address blocks or raw cells, and chart_from_block vs chart_insert are distinguished by block-field vs range-based references. No two tools overlap in function.
Tool names follow a consistent verb_noun pattern with clear prefixes: block_* for block operations, chart_* for charts, and descriptive verbs for others (create_sheet, get_cells, open_workbook). All names use snake_case with verbs first, making them predictable and easy to parse. The only slight deviation is eval_formula, but it still fits the verb_noun pattern.
26 tools is slightly above the 16-25 range typically considered heavy, but the domain is a full spreadsheet application covering workbook lifecycle, block management, cell operations, formula evaluation, dependency analysis, goal seeking, validation, preview, charts, and import/export. Each tool earns its place given the breadth of functionality, so the count is justified despite being on the higher end.
The surface covers the full lifecycle of blocks (create, convert, add/delete/move rows, set cells, describe, set description), sheets (create, get/set cells), charts (insert/list/update/delete), workbook open/save/export, and advanced analysis (trace, goal seek, preview, validation). Minor gaps exist: there is no delete_sheet or delete_block tool, and block renaming is not directly supported, but these can be worked around by clearing content or recreating. Overall, the core workflows are well-covered.