Bug Description

The readSpreadsheet tool accepts a valueRenderOption parameter (with options FORMATTED_VALUE, UNFORMATTED_VALUE, FORMULA), but the parameter is never passed through to the Google Sheets API call. This means requesting FORMULA still returns computed/formatted values instead of the actual formula strings.

Steps to Reproduce

1. Create a spreadsheet with a formula in a cell (e.g., =SUM(A1:A5))
2. Call readSpreadsheet with valueRenderOption: "FORMULA"
3. Observe that the result contains the computed value (e.g., "15") instead of the formula string (e.g., "=SUM(A1:A5)")

Root Cause

Two places where the parameter is dropped:

1. src/tools/sheets/readSpreadsheet.ts (line 30) — args.valueRenderOption is not passed to the helper:

   const response = await SheetsHelpers.readRange(sheets, args.spreadsheetId, args.range);

2. src/googleSheetsApiHelpers.ts — readRange() doesn't accept or forward the parameter to sheets.spreadsheets.values.get().

Expected Behavior

When valueRenderOption: "FORMULA" is passed, the API should return formula strings (e.g., "=SUM(A1:A5)") instead of computed values.

Fix

• Add valueRenderOption parameter to readRange() in the helpers file
• Pass args.valueRenderOption in the tool's execute call
• Forward it to sheets.spreadsheets.values.get({ spreadsheetId, range, valueRenderOption })