create_label
Create custom labels in Gmail to organize emails by setting display name, visibility options, and color preferences for better email management.
Instructions
Create a new label
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| name | Yes | The display name of the label | |
| messageListVisibility | No | The visibility of messages with this label in the message list | |
| labelListVisibility | No | The visibility of the label in the label list | |
| color | No | The color settings for the label |
Implementation Reference
- src/index.ts:436-453 (registration)Registration of the 'create_label' MCP tool using server.tool(), which includes the tool name, description, Zod input schema, and inline handler function.server.tool("create_label", "Create a new label", { name: z.string().describe("The display name of the label"), messageListVisibility: z.enum(['show', 'hide']).optional().describe("The visibility of messages with this label in the message list"), labelListVisibility: z.enum(['labelShow', 'labelShowIfUnread', 'labelHide']).optional().describe("The visibility of the label in the label list"), color: z.object({ textColor: z.string().describe("The text color of the label as hex string"), backgroundColor: z.string().describe("The background color of the label as hex string") }).optional().describe("The color settings for the label") }, async (params) => { return handleTool(config, async (gmail: gmail_v1.Gmail) => { const { data } = await gmail.users.labels.create({ userId: 'me', requestBody: params }) return formatResponse(data) }) } )
- src/index.ts:447-452 (handler)The handler function for the create_label tool. It uses the shared handleTool utility to authenticate and call the Gmail API's users.labels.create method with the provided parameters, then formats the response.async (params) => { return handleTool(config, async (gmail: gmail_v1.Gmail) => { const { data } = await gmail.users.labels.create({ userId: 'me', requestBody: params }) return formatResponse(data) }) }
- src/index.ts:439-446 (schema)Zod schema for the create_label tool inputs: required 'name', optional 'messageListVisibility', 'labelListVisibility', and 'color' object with text and background colors.name: z.string().describe("The display name of the label"), messageListVisibility: z.enum(['show', 'hide']).optional().describe("The visibility of messages with this label in the message list"), labelListVisibility: z.enum(['labelShow', 'labelShowIfUnread', 'labelHide']).optional().describe("The visibility of the label in the label list"), color: z.object({ textColor: z.string().describe("The text color of the label as hex string"), backgroundColor: z.string().describe("The background color of the label as hex string") }).optional().describe("The color settings for the label") },
- src/index.ts:50-80 (helper)Shared helper function handleTool used by create_label (and other tools) to handle OAuth2 authentication, Gmail client creation, API call execution, error handling for auth issues, and response formatting.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) { // Check for specific authentication errors if ( error.message?.includes("invalid_grant") || error.message?.includes("refresh_token") || error.message?.includes("invalid_client") || error.message?.includes("unauthorized_client") || error.code === 401 || error.code === 403 ) { return formatResponse({ error: `Authentication failed: ${error.message}. Please re-authenticate by running: npx @shinzolabs/gmail-mcp auth`, }); } return formatResponse({ error: `Tool execution failed: ${error.message}` }); } }