AWS MCP Server

Instructions

Implementation Reference

• src/index.ts:1257-1272 (handler)

  The main handler function for the 'list_lambda_functions' tool. It uses the LambdaClient to send a ListFunctionsCommand, maps the response to include FunctionName, Runtime, LastModified, Handler, and CodeSize, and returns the JSON stringified list.
  if (name === "list_lambda_functions") { const command = new ListFunctionsCommand({}); const response = await lambdaClient.send(command); const funcs = response.Functions?.map(f => ({ FunctionName: f.FunctionName, Runtime: f.Runtime, LastModified: f.LastModified, Handler: f.Handler, CodeSize: f.CodeSize })) || []; return { content: [{ type: "text", text: JSON.stringify(funcs, null, 2) }] }; }
• src/index.ts:393-399 (registration)

  Registration of the 'list_lambda_functions' tool in the ListTools response, including its name, description, and empty input schema (no parameters required).
  name: "list_lambda_functions", description: "Lists Lambda functions with runtimes and last modified dates.", inputSchema: { type: "object", properties: {} } },
• src/index.ts:395-399 (schema)

  Input schema for the tool, which is an empty object (no input parameters needed).
  inputSchema: { type: "object", properties: {} } },
• src/index.ts:64-64 (helper)

  Initialization of the shared LambdaClient used by the handler.
  const lambdaClient = new LambdaClient({});
• src/index.ts:30-30 (helper)

  Import of LambdaClient and ListFunctionsCommand from AWS SDK.
  import { LambdaClient, ListFunctionsCommand } from "@aws-sdk/client-lambda";