Server has 7 tools with basic schemas and descriptions, but significant gaps limit production readiness. All tools have descriptions (10-80 chars, mostly short) and input schemas with type definitions. However, descriptions are terse and lack context for LLM selection. Parameter descriptions are minimal (e.g., 'Absolute path to the Excel file' repeated across tools). No output schemas documented. Error handling is present but not recovery-focused. Tool naming follows verb_noun pattern (excel_*) but lacks clarity on when to use similar tools (e.g., excel_read_sheet vs excel_describe_sheets). No tool annotations (readOnlyHint/destructiveHint) despite clear risk stratification in metadata.

• Add output schemas to all tools. Document the structure of responses (e.g., excel_read_sheet returns {data: [[string]], range: string, sheetName: string}).
• Expand tool descriptions to 100-200 chars. Include WHEN to use the tool and WHAT it returns. E.g., 'Reads cell values from a worksheet and returns them as a 2D array. Use this to extract data; use excel_describe_sheets to list available worksheets first.'
• Add tool annotations: mark excel_read_sheet, excel_describe_sheets, excel_screen_capture with readOnlyHint=true; mark excel_write_to_sheet, excel_create_table, excel_copy_sheet, excel_format_range with destructiveHint=true.
• For excel_format_range, define the 'style' parameter as a structured object with typed properties (border: {style: enum, color: string}, font: {bold: boolean, size: number}, fill: {color: string}, numFmt: string, decimalPlaces: number) instead of free-form YAML.
• Add parameter constraints: filePath should validate as an absolute path; range should match regex A1:Z99 or similar; sheetName should be non-empty string. Document these in descriptions.