src/tools/drive/renameFile.ts

import type { FastMCP } from 'fastmcp';
import { UserError } from 'fastmcp';
import { z } from 'zod';
import { getDriveClient } from '../../clients.js';

export function register(server: FastMCP) {
  server.addTool({
    name: 'renameFile',
    description: 'Renames a file or folder in Google Drive. Returns the updated file info.',
    parameters: z.strictObject({
      fileId: z
        .string()
        .describe('The file or folder ID from a Google Drive URL or a previous tool result.'),
      newName: z.string().min(1).describe('New name for the file or folder.'),
    }),
    execute: async (args, { log }) => {
      const drive = await getDriveClient();
      log.info(`Renaming file ${args.fileId} to "${args.newName}"`);

      try {
        const response = await drive.files.update({
          fileId: args.fileId,
          requestBody: {
            name: args.newName,
          },
          fields: 'id,name,webViewLink',
          supportsAllDrives: true,
        });

        const file = response.data;
        return `Successfully renamed to "${file.name}" (ID: ${file.id})\nLink: ${file.webViewLink}`;
      } catch (error: any) {
        log.error(`Error renaming file: ${error.message || error}`);
        if (error.code === 404) throw new UserError('File not found. Check the file ID.');
        if (error.code === 403)
          throw new UserError('Permission denied. Make sure you have write access to this file.');
        throw new UserError(`Failed to rename file: ${error.message || 'Unknown error'}`);
      }
    },
  });
}