MongoDB MCP Server

Instructions

Implementation Reference

• src/tools/mongodb/create/createIndex.ts:18-40 (handler)

  The main handler function that connects to MongoDB and calls createIndexes to create the specified index on the collection.

  protected async execute({
      database,
      collection,
      keys,
      name,
  }: ToolArgs<typeof this.argsShape>): Promise<CallToolResult> {
      const provider = await this.ensureConnected();
      const indexes = await provider.createIndexes(database, collection, [
          {
              key: keys,
              name,
          },
      ]);
  
      return {
          content: [
              {
                  text: `Created the index "${indexes[0]}" on collection "${collection}" in database "${database}"`,
                  type: "text",
              },
          ],
      };
  }

• src/tools/mongodb/create/createIndex.ts:10-14 (schema)

  Zod schema defining the input arguments for the create-index tool, including database, collection (from DbOperationArgs), keys for the index, and optional name.

  protected argsShape = {
      ...DbOperationArgs,
      keys: z.record(z.string(), z.custom<IndexDirection>()).describe("The index definition"),
      name: z.string().optional().describe("The name of the index"),
  };

• src/tools/mongodb/tools.ts:22-43 (registration)

  Registers CreateIndexTool (imported from ./create/createIndex.js) in the array of all MongoDB tools.

  export const MongoDbTools = [
      ConnectTool,
      ListCollectionsTool,
      ListDatabasesTool,
      CollectionIndexesTool,
      CreateIndexTool,
      CollectionSchemaTool,
      FindTool,
      InsertManyTool,
      DeleteManyTool,
      CollectionStorageSizeTool,
      CountTool,
      DbStatsTool,
      AggregateTool,
      UpdateManyTool,
      RenameCollectionTool,
      DropDatabaseTool,
      DropCollectionTool,
      ExplainTool,
      CreateCollectionTool,
      LogsTool,
  ];

• src/tools/mongodb/create/createIndex.ts:8-8 (registration)

  Defines the tool name as 'create-index' within the CreateIndexTool class.

  protected name = "create-index";