set_default_smime_info

Instructions

Implementation Reference

• src/index.ts:1275-1287 (registration)

  Registers the 'set_default_smime_info' MCP tool, defines its input schema using Zod (sendAsEmail and id), and provides the inline handler function that uses handleTool to authenticate and invoke the Gmail API method gmail.users.settings.sendAs.smimeInfo.setDefault to set the default S/MIME configuration for the specified send-as alias.

  server.tool("set_default_smime_info",
    "Sets the default S/MIME config for the specified send-as alias",
    {
      sendAsEmail: z.string().describe("The email address that appears in the 'From:' header"),
      id: z.string().describe("The immutable ID for the S/MIME config")
    },
    async (params) => {
      return handleTool(config, async (gmail: gmail_v1.Gmail) => {
        const { data } = await gmail.users.settings.sendAs.smimeInfo.setDefault({ userId: 'me', sendAsEmail: params.sendAsEmail, id: params.id })
        return formatResponse(data)
      })
    }
  )

• src/index.ts:1281-1286 (handler)

  The core handler logic for the tool, which delegates to the shared handleTool utility for authentication and Gmail client creation, then calls the specific Gmail API endpoint to set the default S/MIME info.

  async (params) => {
    return handleTool(config, async (gmail: gmail_v1.Gmail) => {
      const { data } = await gmail.users.settings.sendAs.smimeInfo.setDefault({ userId: 'me', sendAsEmail: params.sendAsEmail, id: params.id })
      return formatResponse(data)
    })
  }

• src/index.ts:1277-1280 (schema)

  Zod schema defining the input parameters for the tool: sendAsEmail (string) and id (string).

  {
    sendAsEmail: z.string().describe("The email address that appears in the 'From:' header"),
    id: z.string().describe("The immutable ID for the S/MIME config")
  },

• src/index.ts:50-66 (helper)

  Shared helper function used by all Gmail tools, including set_default_smime_info, to handle OAuth2 authentication, credential validation, Gmail client creation, and execution of the API call, 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}`
    }
  }