diff --git a/src-ui/src/app/data/filter-rule-type.ts b/src-ui/src/app/data/filter-rule-type.ts
index 7f0f0d56d..cc3f8ee46 100644
--- a/src-ui/src/app/data/filter-rule-type.ts
+++ b/src-ui/src/app/data/filter-rule-type.ts
@@ -274,6 +274,7 @@ export const FILTER_RULE_TYPES: FilterRuleType[] = [
     multi: false,
   },
   {
+    // Deprecated. UI now uses Tantivy-backed `text` filtervar
     id: FILTER_TITLE_CONTENT,
     filtervar: 'title_content',
     datatype: 'string',
@@ -323,6 +324,7 @@ export const FILTER_RULE_TYPES: FilterRuleType[] = [
   },
   {
     id: FILTER_CUSTOM_FIELDS_TEXT,
+    // Deprecated. UI no longer includes CF text-search mode, but keep for now for existing saved views
     filtervar: 'custom_fields__icontains',
     datatype: 'string',
     multi: false,
diff --git a/src/documents/filters.py b/src/documents/filters.py
index 2f7de1cd4..25272055b 100644
--- a/src/documents/filters.py
+++ b/src/documents/filters.py
@@ -162,6 +162,7 @@ class InboxFilter(Filter):
 
 @extend_schema_field(serializers.CharField)
 class TitleContentFilter(Filter):
+    # Deprecated but retained for existing saved views. UI uses Tantivy-backed `text` / `title_search` params.
     def filter(self, qs: Any, value: Any) -> Any:
         value = value.strip() if isinstance(value, str) else value
         if value:
@@ -747,6 +748,7 @@ class DocumentFilterSet(FilterSet):
 
     is_in_inbox = InboxFilter()
 
+    # Deprecated, but keep for now for existing saved views
     title_content = TitleContentFilter()
 
     content__istartswith = EffectiveContentFilter(lookup_expr="istartswith")
@@ -756,6 +758,7 @@ class DocumentFilterSet(FilterSet):
 
     owner__id__none = ObjectFilter(field_name="owner", exclude=True)
 
+    # Deprecated, UI no longer includes CF text-search mode, but keep for now for existing saved views
     custom_fields__icontains = CustomFieldsFilter()
 
     custom_fields__id__all = ObjectFilter(field_name="custom_fields__field")
diff --git a/src/documents/views.py b/src/documents/views.py
index 6f8c50fab..f3ba6e792 100644
--- a/src/documents/views.py
+++ b/src/documents/views.py
@@ -1999,19 +1999,19 @@ class ChatStreamingView(GenericAPIView):
                 name="text",
                 type=OpenApiTypes.STR,
                 location=OpenApiParameter.QUERY,
-                description="Simple text search query string",
+                description="Simple Tantivy-backed text search query string",
             ),
             OpenApiParameter(
                 name="title_search",
                 type=OpenApiTypes.STR,
                 location=OpenApiParameter.QUERY,
-                description="Simple title-only search query string",
+                description="Simple Tantivy-backed title-only search query string",
             ),
             OpenApiParameter(
                 name="query",
                 type=OpenApiTypes.STR,
                 location=OpenApiParameter.QUERY,
-                description="Advanced search query string",
+                description="Advanced Tantivy search query string",
             ),
             OpenApiParameter(
                 name="full_perms",