Gmail MCP

Instructions

Implementation Reference

• src/index.ts:1007-1018 (registration)

  Registration of the 'delete_filter' tool, including inline schema and handler. The handler authenticates via handleTool and calls Gmail API to delete the filter by ID.
  server.tool("delete_filter", "Deletes a filter", { id: z.string().describe("The ID of the filter to be deleted") }, async (params) => { return handleTool(config, async (gmail: gmail_v1.Gmail) => { const { data } = await gmail.users.settings.filters.delete({ userId: 'me', id: params.id }) return formatResponse(data) }) } )
• src/index.ts:1012-1017 (handler)

  Core handler logic for delete_filter: calls Gmail users.settings.filters.delete with the provided filter ID after authentication.
  async (params) => { return handleTool(config, async (gmail: gmail_v1.Gmail) => { const { data } = await gmail.users.settings.filters.delete({ userId: 'me', id: params.id }) return formatResponse(data) }) }
• src/index.ts:1009-1011 (schema)

  Zod input schema defining the required 'id' parameter as a string.
  { id: z.string().describe("The ID of the filter to be deleted") },
• src/index.ts:49-65 (helper)

  Shared helper function used by delete_filter (and other tools) for OAuth2 authentication, client creation, and executing the Gmail API call.
  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}` } }