diff --git a/airflow/api_fastapi/openapi/v1-generated.yaml b/airflow/api_fastapi/openapi/v1-generated.yaml
index b4bbf0598b7bd1..48e9544c10cd44 100644
--- a/airflow/api_fastapi/openapi/v1-generated.yaml
+++ b/airflow/api_fastapi/openapi/v1-generated.yaml
@@ -509,12 +509,12 @@ components:
         catchup:
           type: boolean
           title: Catchup
-        dagrun_timeout:
+        dag_run_timeout:
           anyOf:
           - type: string
             format: duration
           - type: 'null'
-          title: Dagrun Timeout
+          title: Dag Run Timeout
         dataset_expression:
           anyOf:
           - type: object
@@ -547,31 +547,30 @@ components:
           title: Orientation
         params:
           anyOf:
-          - {}
+          - type: object
           - type: 'null'
           title: Params
         render_template_as_native_obj:
           type: boolean
           title: Render Template As Native Obj
-        template_searchpath:
+        template_search_path:
           anyOf:
-          - type: string
           - items:
               type: string
             type: array
           - type: 'null'
-          title: Template Searchpath
+          title: Template Search Path
         timezone:
           anyOf:
           - type: string
           - type: 'null'
           title: Timezone
-        last_loaded:
+        last_parsed:
           anyOf:
           - type: string
             format: date-time
           - type: 'null'
-          title: Last Loaded
+          title: Last Parsed
         file_token:
           type: string
           title: File Token
@@ -582,14 +581,6 @@ components:
           title: Concurrency
           description: Return max_active_tasks as concurrency.
           readOnly: true
-        last_parsed:
-          anyOf:
-          - type: string
-            format: date-time
-          - type: 'null'
-          title: Last Parsed
-          description: Return last_loaded as last_parsed.
-          readOnly: true
       type: object
       required:
       - dag_id
@@ -618,7 +609,7 @@ components:
       - next_dagrun_create_after
       - owners
       - catchup
-      - dagrun_timeout
+      - dag_run_timeout
       - dataset_expression
       - doc_md
       - start_date
@@ -627,12 +618,11 @@ components:
       - orientation
       - params
       - render_template_as_native_obj
-      - template_searchpath
+      - template_search_path
       - timezone
-      - last_loaded
+      - last_parsed
       - file_token
       - concurrency
-      - last_parsed
       title: DAGDetailsResponse
       description: Specific serializer for DAG Details responses.
     DAGPatchBody:
diff --git a/airflow/api_fastapi/serializers/dags.py b/airflow/api_fastapi/serializers/dags.py
index 7275455022f151..964e526d31d266 100644
--- a/airflow/api_fastapi/serializers/dags.py
+++ b/airflow/api_fastapi/serializers/dags.py
@@ -116,17 +116,13 @@ class DAGDetailsResponse(DAGResponse):
     timezone: str | None
     last_parsed: datetime | None
 
-    def _validation_alias_fn(field_name: str):
-        val_dict = {
-            "dag_run_timeout": "dagrun_timeout",
-            "last_parsed": "last_loaded",
-            "template_search_path": "template_searchpath",
-        }
-        return val_dict.get(field_name, field_name)
-
     model_config = ConfigDict(
         alias_generator=AliasGenerator(
-            validation_alias=_validation_alias_fn,
+            validation_alias=lambda field_name: {
+                "dag_run_timeout": "dagrun_timeout",
+                "last_parsed": "last_loaded",
+                "template_search_path": "template_searchpath",
+            }.get(field_name, field_name),
         )
     )
 
diff --git a/airflow/ui/openapi-gen/requests/schemas.gen.ts b/airflow/ui/openapi-gen/requests/schemas.gen.ts
index 56f2412e879c26..e8aae616be06c0 100644
--- a/airflow/ui/openapi-gen/requests/schemas.gen.ts
+++ b/airflow/ui/openapi-gen/requests/schemas.gen.ts
@@ -239,7 +239,7 @@ export const $DAGDetailsResponse = {
       type: "boolean",
       title: "Catchup",
     },
-    dagrun_timeout: {
+    dag_run_timeout: {
       anyOf: [
         {
           type: "string",
@@ -249,7 +249,7 @@ export const $DAGDetailsResponse = {
           type: "null",
         },
       ],
-      title: "Dagrun Timeout",
+      title: "Dag Run Timeout",
     },
     dataset_expression: {
       anyOf: [
@@ -314,7 +314,9 @@ export const $DAGDetailsResponse = {
     },
     params: {
       anyOf: [
-        {},
+        {
+          type: "object",
+        },
         {
           type: "null",
         },
@@ -325,11 +327,8 @@ export const $DAGDetailsResponse = {
       type: "boolean",
       title: "Render Template As Native Obj",
     },
-    template_searchpath: {
+    template_search_path: {
       anyOf: [
-        {
-          type: "string",
-        },
         {
           items: {
             type: "string",
@@ -340,7 +339,7 @@ export const $DAGDetailsResponse = {
           type: "null",
         },
       ],
-      title: "Template Searchpath",
+      title: "Template Search Path",
     },
     timezone: {
       anyOf: [
@@ -353,7 +352,7 @@ export const $DAGDetailsResponse = {
       ],
       title: "Timezone",
     },
-    last_loaded: {
+    last_parsed: {
       anyOf: [
         {
           type: "string",
@@ -363,7 +362,7 @@ export const $DAGDetailsResponse = {
           type: "null",
         },
       ],
-      title: "Last Loaded",
+      title: "Last Parsed",
     },
     file_token: {
       type: "string",
@@ -377,20 +376,6 @@ export const $DAGDetailsResponse = {
       description: "Return max_active_tasks as concurrency.",
       readOnly: true,
     },
-    last_parsed: {
-      anyOf: [
-        {
-          type: "string",
-          format: "date-time",
-        },
-        {
-          type: "null",
-        },
-      ],
-      title: "Last Parsed",
-      description: "Return last_loaded as last_parsed.",
-      readOnly: true,
-    },
   },
   type: "object",
   required: [
@@ -420,7 +405,7 @@ export const $DAGDetailsResponse = {
     "next_dagrun_create_after",
     "owners",
     "catchup",
-    "dagrun_timeout",
+    "dag_run_timeout",
     "dataset_expression",
     "doc_md",
     "start_date",
@@ -429,12 +414,11 @@ export const $DAGDetailsResponse = {
     "orientation",
     "params",
     "render_template_as_native_obj",
-    "template_searchpath",
+    "template_search_path",
     "timezone",
-    "last_loaded",
+    "last_parsed",
     "file_token",
     "concurrency",
-    "last_parsed",
   ],
   title: "DAGDetailsResponse",
   description: "Specific serializer for DAG Details responses.",
diff --git a/airflow/ui/openapi-gen/requests/types.gen.ts b/airflow/ui/openapi-gen/requests/types.gen.ts
index df779a4a3f8221..c0419302e9d61b 100644
--- a/airflow/ui/openapi-gen/requests/types.gen.ts
+++ b/airflow/ui/openapi-gen/requests/types.gen.ts
@@ -38,7 +38,7 @@ export type DAGDetailsResponse = {
   next_dagrun_create_after: string | null;
   owners: Array<string>;
   catchup: boolean;
-  dagrun_timeout: string | null;
+  dag_run_timeout: string | null;
   dataset_expression: {
     [key: string]: unknown;
   } | null;
@@ -47,11 +47,13 @@ export type DAGDetailsResponse = {
   end_date: string | null;
   is_paused_upon_creation: boolean | null;
   orientation: string;
-  params: unknown | null;
+  params: {
+    [key: string]: unknown;
+  } | null;
   render_template_as_native_obj: boolean;
-  template_searchpath: string | Array<string> | null;
+  template_search_path: Array<string> | null;
   timezone: string | null;
-  last_loaded: string | null;
+  last_parsed: string | null;
   /**
    * Return file token.
    */
@@ -60,10 +62,6 @@ export type DAGDetailsResponse = {
    * Return max_active_tasks as concurrency.
    */
   readonly concurrency: number;
-  /**
-   * Return last_loaded as last_parsed.
-   */
-  readonly last_parsed: string | null;
 };
 
 /**