MCP-MongoDB-MySQL-Server

Instructions

Implementation Reference

• src/index.ts:1102-1125 (handler)

  The handler function that executes the tool logic: ensures MongoDB connection, validates collection name, creates the collection with optional options, returns success message or throws appropriate MCP error.

  private async handleMongoDBCreateCollection(args: any) {
    await this.ensureMongoConnection();
  
    if (!args.collection) {
      throw new McpError(ErrorCode.InvalidParams, 'Collection name is required');
    }
  
    try {
      await this.mongoDB!.createCollection(args.collection, args.options || {});
      return {
        content: [
          {
            type: 'text',
            text: `Collection ${args.collection} created successfully`,
          },
        ],
      };
    } catch (error) {
      throw new McpError(
        ErrorCode.InternalError,
        `Failed to create collection: ${getErrorMessage(error)}`
      );
    }
  }

• src/index.ts:513-531 (registration)

  Tool registration in the listTools response, defining the tool name, description, and input schema for validation.

  {
    name: 'mongodb_create_collection',
    description: 'Create a new collection in MongoDB',
    inputSchema: {
      type: 'object',
      properties: {
        collection: {
          type: 'string',
          description: 'Collection name',
        },
        options: {
          type: 'object',
          description: 'Collection options',
          optional: true
        }
      },
      required: ['collection'],
    },
  }

• src/index.ts:564-565 (registration)

  Switch case in callTool handler that routes requests for this tool to the specific handler method.

  case 'mongodb_create_collection':
    return await this.handleMongoDBCreateCollection(request.params.arguments);