missing docs

Author: aaronbrezel

rollup.config.js

@@ -58,8 +58,8 @@ function sampleRowsToEvaluation() { _GASEntry.sampleRowsToEvaluation(); }
  * Call the Gemini API from a spreadsheet cell.
  * @param {string|Array} userTexts One or more text parts for the user message.
  *   Pass a single string, a cell reference, or a range / array literal.
- * @param {string} systemPrompt System-level instruction for the model.
- * @param {string|Array} toolNames Names of pre-registered tools to enable.
+ * @param {string} [systemPrompt] (Optional) System-level instruction for the model.
+ * @param {string|Array} [toolNames] (Optional) Names of pre-registered tools to enable.
  * @return {string} The model's text response, or "[SSI Error: ...]" on failure.
  * @customfunction
  */