JavaScript

export const tool = {
  list() {
    return JSON.stringify([
      {
        name: "parse_csv",
        description: "Parse CSV text into structured JSON",
        inputSchema: {
          type: "object",
          properties: {
            csv: { type: "string", description: "CSV content" },
            hasHeaders: { type: "boolean", description: "Whether first row is headers" }
          },
          required: ["csv"]
        }
      }
    ]);
  },

  call(name, input) {
    const args = JSON.parse(input);

    if (name === "parse_csv") {
      const lines = args.csv.trim().split("\n");
      const hasHeaders = args.hasHeaders !== false;
      const headers = hasHeaders
        ? lines[0].split(",").map(h => h.trim())
        : lines[0].split(",").map((_, i) => `col_${i}`);
      const dataLines = hasHeaders ? lines.slice(1) : lines;

      const rows = dataLines.map(line => {
        const values = line.split(",").map(v => v.trim());
        const row = {};
        headers.forEach((h, i) => { row[h] = values[i] || ""; });
        return row;
      });

      return JSON.stringify({
        content: [{ type: "text", text: JSON.stringify(rows, null, 2) }]
      });
    }

    return JSON.stringify({ error: `Unknown tool: ${name}` });
  }
};

call(name, input) {
  try {
    const args = JSON.parse(input);
    // ... tool logic
  } catch (err) {
    return JSON.stringify({
      isError: true,
      content: [{
        type: "text",
        text: `Error: ${err.message}`
      }]
    });
  }
}