modify_thread
Change labels on Gmail threads by adding or removing label IDs to organize email conversations.
Instructions
Modify the labels applied to a thread
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| id | Yes | The ID of the thread to modify | |
| addLabelIds | No | A list of label IDs to add to the thread | |
| removeLabelIds | No | A list of label IDs to remove from the thread |
Implementation Reference
- src/index.ts:775-789 (registration)Registers the 'modify_thread' MCP tool with input schema validation using Zod and an inline async handler function that calls the Gmail API to modify thread labels.server.tool("modify_thread", "Modify the labels applied to a thread", { id: z.string().describe("The ID of the thread to modify"), addLabelIds: z.array(z.string()).optional().describe("A list of label IDs to add to the thread"), removeLabelIds: z.array(z.string()).optional().describe("A list of label IDs to remove from the thread") }, async (params) => { const { id, ...threadData } = params return handleTool(config, async (gmail: gmail_v1.Gmail) => { const { data } = await gmail.users.threads.modify({ userId: 'me', id, requestBody: threadData }) return formatResponse(data) }) } )
- src/index.ts:782-788 (handler)Inline handler function for the 'modify_thread' tool. Destructures thread ID and label changes, invokes handleTool helper to perform authenticated Gmail API call to users.threads.modify, and formats the response.async (params) => { const { id, ...threadData } = params return handleTool(config, async (gmail: gmail_v1.Gmail) => { const { data } = await gmail.users.threads.modify({ userId: 'me', id, requestBody: threadData }) return formatResponse(data) }) }
- src/index.ts:778-781 (schema)Zod schema defining input parameters for 'modify_thread' tool: required thread ID and optional label IDs to add/remove.id: z.string().describe("The ID of the thread to modify"), addLabelIds: z.array(z.string()).optional().describe("A list of label IDs to add to the thread"), removeLabelIds: z.array(z.string()).optional().describe("A list of label IDs to remove from the thread") },
- src/index.ts:50-66 (helper)Shared helper function used by all Gmail tools, including 'modify_thread', to handle OAuth2 authentication, 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}` } }
- src/index.ts:48-48 (helper)Utility function to format API responses for MCP tool output in the expected structure.const formatResponse = (response: any) => ({ content: [{ type: "text", text: JSON.stringify(response) }] })