| `org.opencontainers.image.description`      | Yes      | Human-readable description of the software packaged in the image (string)                                                                                                                                                                                                                                                                                                                                                                                                                             | This extension is cool.                                                                                                                                                                                                                                         |
| `org.opencontainers.image.vendor`           | Yes      | Name of the distributing entity, organization, or individual.                                                                                                                                                                                                                                                                                                                                                                                                                                         | Acme, Inc.                                                                                                                                                                                                                                                      |
| `com.docker.desktop.extension.api.version`  | Yes      | Version of the Docker Extension manager that the extension is compatible with. It must follow [semantic versioning](https://semver.org/).                                                                                                                                                                                                                                                                                                                                                             | A specific version like `0.1.0` or, a constraint expression: `>= 0.1.0`, `>= 1.4.7, < 2.0` . For your first extension, you can use `docker extension version` to know the SDK API version and specify `>= <SDK_API_VERSION>`.                                   |
| `com.docker.desktop.extension.icon`         | Yes      | The extension icon (format: .svg .png .jpg)                                                                                                                                                                                                                                                                                                                                                                                                                                                           | `https://example.com/assets/image.svg`                                                                                                                                                                                                                          |
| `com.docker.extension.screenshots`          | Yes      | A JSON array of image URLs and an alternative text displayed to users (in the order they appear in your metadata) in your extension's details page. **Note:** The recommended size for screenshots is 2400x1600 pixels.                                                                                                                                                                                                                                                                               | `[{"alt":"alternative text for image 1",` `"url":"https://example.com/image1.png"},` `{"alt":"alternative text for image2",` `"url":"https://example.com/image2.jpg"}]`                                                                                         |