get_attachment
Retrieve email attachments from Gmail messages by providing the message ID and attachment ID. Access files and documents stored in your Gmail account for viewing or downloading.
Instructions
Get a message attachment
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| messageId | Yes | ID of the message containing the attachment | |
| id | Yes | The ID of the attachment |
Implementation Reference
- src/index.ts:669-681 (registration)MCP tool registration for 'get_attachment'. Includes input schema (messageId, id), description, and inline handler function that authenticates via handleTool and calls Gmail API to get the attachment, then formats response.server.tool("get_attachment", "Get a message attachment", { messageId: z.string().describe("ID of the message containing the attachment"), id: z.string().describe("The ID of the attachment"), }, async (params) => { return handleTool(config, async (gmail: gmail_v1.Gmail) => { const { data } = await gmail.users.messages.attachments.get({ userId: 'me', messageId: params.messageId, id: params.id }) return formatResponse(data) }) } )
- src/index.ts:675-680 (handler)Handler function for get_attachment tool: takes params, uses handleTool to execute Gmail attachments.get API call with messageId and id, returns formatted response.async (params) => { return handleTool(config, async (gmail: gmail_v1.Gmail) => { const { data } = await gmail.users.messages.attachments.get({ userId: 'me', messageId: params.messageId, id: params.id }) return formatResponse(data) }) }
- src/index.ts:672-674 (schema)Zod input schema for get_attachment tool defining required string parameters messageId and id.messageId: z.string().describe("ID of the message containing the attachment"), id: z.string().describe("The ID of the attachment"), },
- src/index.ts:49-65 (helper)Shared helper for tool execution: manages 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:47-48 (helper)Helper to format API responses as MCP content array with JSON stringified text.const formatResponse = (response: any) => ({ content: [{ type: "text", text: JSON.stringify(response) }] })