Most tools map to a distinct resource/action, and the Japanese descriptions generally clarify the boundaries between journals, transactions, reports, and master data. A few pairs could still be confused, such as `postJournals` vs `postTransactionJournalize` and `getJournals` vs `getTransactions`, and `deleteVouchers` is misleading since it only unlinks rather than deletes a voucher.

The domain tools mostly follow a readable `mfc_ca_{HTTP verb}{Resource}` camelCase pattern, but the top-level utilities use a different snake_case style (`list_offices`, `auth_status`, `mf_api_info`). There are also odd deviations like `mfc_ca_currentOffice` with no verb and awkward report names such as `getReportsTrialBalanceBalanceSheet`.

26 tools is above the 25-tool threshold and feels heavy for a flat MCP surface. While most tools are individually distinct, several read-only master-data and report endpoints could be consolidated, making tool selection harder for an agent.

Core journal workflows are well covered with create, read, list, update, and delete, plus reports and transaction journalization. However, there are notable lifecycle gaps: trade partners and other master data are mostly read-only or create-only, vouchers cannot be listed or reattached after unlinking, and `postVouchers` can create orphan vouchers with no later attachment path.