Scored across 7 tools
The seven tools split by resource domain (read, edit, format, structure, workbook, app, help), and each description explicitly cross-references where a neighboring tool owns an operation (values=edit, formatting=format, sheets/rows/tables=structure). A few boundaries are inherently fuzzy — clear_range with what='formats', apply_style vs format_cells, and the deliberate autofit duplication (set_dimensions estimate vs xl_app com_autofit exact) — but the descriptions call these out, so misselection is unlikely rather than impossible.
Every tool follows the same 'xl_' + lowercase domain-noun convention (xl_read, xl_edit, xl_format, xl_structure, xl_workbook, xl_app, xl_help), with no mixing of camelCase, snake_case, or verb styles. The set is a resource taxonomy rather than verb_noun, but it is applied perfectly consistently and is easy to predict and extend.
Seven top-level tools is well within the ideal range and each namespace earns its place as a genuine domain (read, edit, format, structure, workbook, Excel COM, help). The caveat is that each 'tool' is a mega-tool with 8-10+ listed ops plus an undisclosed tail ('more ops follow in the op parameter's description'), which makes the effective surface much larger than seven suggests.
The surface covers the full Excel lifecycle end to end: creation and copying (xl_workbook), reading and auditing (xl_read), values and formulas (xl_edit), styling and objects (xl_format), sheets/rows/tables/names/validation (xl_structure), plus real-Excel operations like pivots, PDF/PNG export, and password encryption (xl_app). Backups, validation, dry-run, and help are also present, so there are no obvious dead ends for the stated domain.