Docker MCP Server

Instructions

Implementation Reference

• src/index.ts:353-371 (handler)

  The handler function that implements the logic for pulling a Docker image using the 'docker pull' command. It validates the image argument and returns the command output.

  private async pullImage(args: ImageArgs) {
    if (!args.image) {
      throw new McpError(
        ErrorCode.InvalidParams,
        'Image parameter is required'
      );
    }
    
    const { stdout } = await execAsync(`docker pull ${args.image}`);
    
    return {
      content: [
        {
          type: 'text',
          text: stdout.trim(),
        },
      ],
    };
  }

• src/index.ts:169-182 (registration)

  The registration of the 'pull_image' tool in the list of tools provided to the MCP client, including its name, description, and input schema.

  {
    name: 'pull_image',
    description: 'Pull a Docker image from a registry',
    inputSchema: {
      type: 'object',
      properties: {
        image: {
          type: 'string',
          description: 'Image name (e.g. "nginx:latest")',
        },
      },
      required: ['image'],
    },
  },

• src/index.ts:36-38 (schema)

  TypeScript interface defining the input arguments for the pull_image tool.

  interface ImageArgs {
    image: string;
  }