Gmail MCP

Instructions

Implementation Reference

• src/index.ts:1112-1123 (registration)

  Registration of the 'delete_send_as' MCP tool, including description, input schema, and handler function that deletes a send-as alias via Gmail API.
  server.tool("delete_send_as", "Deletes the specified send-as alias", { sendAsEmail: z.string().describe("The send-as alias to be deleted") }, async (params) => { return handleTool(config, async (gmail: gmail_v1.Gmail) => { const { data } = await gmail.users.settings.sendAs.delete({ userId: 'me', sendAsEmail: params.sendAsEmail }) return formatResponse(data) }) } )
• src/index.ts:1117-1122 (handler)

  Handler function executing the 'delete_send_as' tool logic: authenticates via handleTool, calls Gmail API to delete the sendAsEmail alias, and formats response.
  async (params) => { return handleTool(config, async (gmail: gmail_v1.Gmail) => { const { data } = await gmail.users.settings.sendAs.delete({ userId: 'me', sendAsEmail: params.sendAsEmail }) return formatResponse(data) }) }
• src/index.ts:1114-1116 (schema)

  Zod input schema for 'delete_send_as' tool: requires 'sendAsEmail' as string.
  { sendAsEmail: z.string().describe("The send-as alias to be deleted") },
• src/index.ts:49-65 (helper)

  Shared 'handleTool' helper used by 'delete_send_as' (and other tools) for OAuth2 client creation, credential validation, Gmail client setup, API call execution, and error handling.
  const handleTool = async (queryConfig: Record<string, any> | undefined, apiCall: (gmail: gmail_v1.Gmail) => Promise<any>) => { try { const oauth2Client = queryConfig ? createOAuth2Client(queryConfig) : defaultOAuth2Client if (!oauth2Client) throw new Error('OAuth2 client could not be created, please check your credentials') const credentialsAreValid = await validateCredentials(oauth2Client) if (!credentialsAreValid) throw new Error('OAuth2 credentials are invalid, please re-authenticate') const gmailClient = queryConfig ? google.gmail({ version: 'v1', auth: oauth2Client }) : defaultGmailClient if (!gmailClient) throw new Error('Gmail client could not be created, please check your credentials') const result = await apiCall(gmailClient) return result } catch (error: any) { return `Tool execution failed: ${error.message}` } }
• src/index.ts:47-47 (helper)

  Shared 'formatResponse' helper used to format tool responses as MCP content blocks with JSON stringified data.
  const formatResponse = (response: any) => ({ content: [{ type: "text", text: JSON.stringify(response) }] })