Server has 14 tools with complete schemas and descriptions. Naming follows verb_noun convention (excel_get_cell, excel_set_cell). Descriptions are present but brief (avg ~60 chars, below 194-char baseline). Parameters have types and descriptions. Error handling exists via ToolError with code inference. However, descriptions lack WHEN/WHY context, parameter constraints are minimal (no enums for constrained inputs), and output schemas are not documented. Tool composition is reasonable but some tools combine multiple concerns (e.g., excel_copy_range + excel_paste_range could be unified). No pagination support for list operations. Legacy tools (excel_capture_range_ref, excel_insert_range_ref) are disabled but still registered.

• Document output schemas for each tool. E.g., excel_get_cell returns {ok: true, data: {value: string|number, type: string}}. Include this in tool descriptions or a separate schema registry.
• Expand descriptions to 50-200 chars with WHEN/WHY context. E.g., 'Get a single cell value by A1 reference. Use this for reading formulas or values; use excel_get_range for multiple cells.' Include return type.
• Add format constraints to parameter descriptions. E.g., 'Cell reference in A1 notation (A1, B2, Z99; uppercase letters + digits)' or use JSON Schema pattern field and reference it in description.
• Remove or properly deprecate legacy tools. Either delete excel_capture_range_ref and excel_insert_range_ref from the registry, or return a clear error: 'This tool is deprecated. Use excel_copy_range and excel_paste_range instead.'
• Enhance error messages with recovery hints. E.g., if excel_find_cell fails, return: 'Text "xyz" not found in range A1:Z100. Try: (1) search with partial text, (2) check spelling, (3) expand range, or (4) use excel_get_range to inspect values manually.'