Function summarizeChartForModel

packages/tools/src/definitions/render-chart.ts:101–120

(
  type: string,
  title: string,
  rows: Record<string, unknown>[],
  truncated: boolean,
  locale?: string
)

}

function summarizeChartForModel(
  type: string,
  title: string,
  rows: Record<string, unknown>[],
  truncated: boolean,
  locale?: string
): string {
  const summary = summarizeChart(type, title, rows.length, truncated, locale)
  const previewRows = rows.slice(0, DEFAULT_PREVIEW_ROWS)
  const coverage = locale?.startsWith('zh')
    ? `图表已使用${truncated ? '截断后的' : '全部'} ${rows.length} 行数据生成；下面只是数据预览，不要为了查看预览外的行重复调用 render_chart。`
    : `The chart already uses ${truncated ? 'the truncated' : 'all'} ${rows.length} rows; the rows below are only a preview. Do not call render_chart again just to inspect rows outside the preview.`
  if (previewRows.length === 0) return `${summary}\n${coverage}`

  const preview = JSON.stringify(previewRows)
  if (locale?.startsWith('zh')) {
    return `${summary}\n${coverage}\n数据预览（前 ${previewRows.length} 行，用于分析峰值、低谷和差异）：${preview}`
  }
  return `${summary}\n${coverage}\nData preview (first ${previewRows.length} rows; use this to identify peaks, lows, and differences): ${preview}`
}

async function handler(params: Record<string, unknown>, context: ToolExecutionContext): Promise<ToolResult> {
  if (!context.dataProvider) throw new Error('render_chart requires a data provider')