add_delegate
Grant email access to another user by adding them as a delegate to your Gmail account, enabling shared inbox management.
Instructions
Adds a delegate to the specified account
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| delegateEmail | Yes | Email address of delegate to add |
Implementation Reference
- src/index.ts:929-940 (registration)Registration of the 'add_delegate' MCP tool, including description, Zod input schema, and inline async handler function that invokes the Gmail API to add a delegate.
server.tool("add_delegate", "Adds a delegate to the specified account", { delegateEmail: z.string().describe("Email address of delegate to add") }, async (params) => { return handleTool(config, async (gmail: gmail_v1.Gmail) => { const { data } = await gmail.users.settings.delegates.create({ userId: 'me', requestBody: { delegateEmail: params.delegateEmail } }) return formatResponse(data) }) } ) - src/index.ts:934-939 (handler)The core handler function for the add_delegate tool. It uses the shared handleTool helper to manage OAuth2 authentication, create a Gmail client, call the Gmail API to create a delegate, and format the response.
async (params) => { return handleTool(config, async (gmail: gmail_v1.Gmail) => { const { data } = await gmail.users.settings.delegates.create({ userId: 'me', requestBody: { delegateEmail: params.delegateEmail } }) return formatResponse(data) }) } - src/index.ts:931-932 (schema)Input schema for add_delegate tool defined using Zod, requiring a delegateEmail string.
{ delegateEmail: z.string().describe("Email address of delegate to add") - src/index.ts:49-65 (helper)Shared helper function handleTool used by add_delegate (and other tools) to handle OAuth2 client creation, credential validation, Gmail client instantiation, 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)Helper function to format tool responses as MCP content blocks with JSON-stringified data.
const formatResponse = (response: any) => ({ content: [{ type: "text", text: JSON.stringify(response) }] })