"summary": "Read Item",
                        "operationId": "read_item_items__item_id__get",
                        "parameters": [
                            {
                                "required": True,
                                "schema": {"title": "Item Id", "type": "string"},
                                "name": "item_id",
                                "in": "path",
                            }

import org.lastaflute.web.validation.Required;

/**
 * The search form for Mapping.
 */
public class SearchForm {

    /**
     * Default constructor for SearchForm.
     */
    public SearchForm() {
    }

    /**
     * The dictionary ID field for mapping dictionary operations.
     */
    @Required
    public String dictId;

The way to describe this in OpenAPI, is to mark that field as **required**, because it will always be there.

Because of that, the JSON Schema for a model can be different depending on if it's used for **input or output**:

* for **input** the `description` will **not be required**
* for **output** it will be **required** (and possibly `None`, or in JSON terms, `null`)

import org.lastaflute.web.ruts.multipart.MultipartFormFile;
import org.lastaflute.web.validation.Required;

/**
 * Form class for backup file upload.
 * This form handles file uploads for backup and restore operations.
 */
public class UploadForm {

    /**
     * The backup file to be uploaded.
     */
    @Required
    public MultipartFormFile bulkFile;

    /**
     * Default constructor for UploadForm.

                                        "$ref": "#/components/schemas/Body_foo_post_root"
                                    }
                                }
                            },
                            "required": True,
                        },
                        "responses": {
                            "200": {
                                "description": "Successful Response",

# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

import org.lastaflute.web.validation.Required;

/**
 * The download form for stemmer override dictionary.
 * This form is used for downloading stemmer override dictionary files from the admin interface.
 *
 */
public class DownloadForm {

    /**
     * Dictionary ID for identifying the stemmer override dictionary to download.
     */
    @Required
    public String dictId;

    /**

import org.lastaflute.web.validation.Required;

/**
 * The download form for stop words dictionary.
 * This form is used for downloading stop words dictionary files from the admin interface.
 *
 */
public class DownloadForm {

    /**
     * Dictionary ID for identifying the stop words dictionary to download.
     */
    @Required
    public String dictId;

    /**