Word and Excel tools are clearly separated by prefixes, and each add_* operation targets a distinct content type. The only minor ambiguity is between excel_add_chart and excel_write_data, since both involve writing data, but descriptions clarify the purpose.

All tools follow a consistent verb_noun pattern with resource prefixes (word_, excel_), using lowercase snake_case throughout. The verbs are descriptive and predictable across both document types.

16 tools is slightly above the typical 3-15 range, but each tool serves a distinct purpose for Word and Excel document generation. The count feels reasonable for covering two office formats without being bloated.

The tool set covers the full lifecycle of creating and saving Word and Excel documents, with comprehensive content-adding operations. Minor gaps include lack of editing existing files, cell styling, and true chart creation, but these are outside the core generation scope.