update_language
Change the display language in Gmail to customize the interface for different languages, using RFC 3066 language tags to specify the preferred language.
Instructions
Updates language settings
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| displayLanguage | Yes | The language to display Gmail in, formatted as an RFC 3066 Language Tag |
Implementation Reference
- src/index.ts:902-913 (registration)Registration of the 'update_language' MCP tool, including description, Zod input schema (displayLanguage), and inline handler function that uses handleTool to call Gmail API's users.settings.updateLanguage.server.tool("update_language", "Updates language settings", { displayLanguage: z.string().describe("The language to display Gmail in, formatted as an RFC 3066 Language Tag") }, async (params) => { return handleTool(config, async (gmail: gmail_v1.Gmail) => { const { data } = await gmail.users.settings.updateLanguage({ userId: 'me', requestBody: params }) return formatResponse(data) }) } )
- src/index.ts:907-912 (handler)The core handler logic for executing the 'update_language' tool: authenticates via handleTool, calls Gmail API to update language settings with provided params, formats response.async (params) => { return handleTool(config, async (gmail: gmail_v1.Gmail) => { const { data } = await gmail.users.settings.updateLanguage({ userId: 'me', requestBody: params }) return formatResponse(data) }) }
- src/index.ts:904-906 (schema)Zod schema defining the input parameters for the update_language tool: requires a displayLanguage string (RFC 3066 format).{ displayLanguage: z.string().describe("The language to display Gmail in, formatted as an RFC 3066 Language Tag") },
- src/index.ts:50-66 (helper)Shared helper function used by update_language (and other tools) for OAuth2 authentication, credential validation, Gmail client creation, and API call execution with 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}` } }