diff --git a/specs/abtesting/common/parameters.yml b/specs/abtesting/common/parameters.yml
index 264d5b7650..e2d6200d31 100644
--- a/specs/abtesting/common/parameters.yml
+++ b/specs/abtesting/common/parameters.yml
@@ -10,7 +10,7 @@ ID:
 # misc
 index:
   type: string
-  description: A/B test index.
+  description: Index name of the A/B test variant (case-sensitive).
   example: 'delcourt_production'
 
 abTestID:
diff --git a/specs/common/parameters.yml b/specs/common/parameters.yml
index 36952fbb3e..8be4ac18a8 100644
--- a/specs/common/parameters.yml
+++ b/specs/common/parameters.yml
@@ -137,7 +137,7 @@ id:
 indexName:
   type: string
   example: products
-  description: Index name.
+  description: Index name (case-sensitive).
 
 hitsPerPage:
   type: integer
diff --git a/specs/common/schemas/IndexSettings.yml b/specs/common/schemas/IndexSettings.yml
index 33dfec6307..8cb0b8d5e3 100644
--- a/specs/common/schemas/IndexSettings.yml
+++ b/specs/common/schemas/IndexSettings.yml
@@ -22,9 +22,10 @@ baseIndexSettings:
       description: |
         Attributes used for [faceting](https://www.algolia.com/doc/guides/managing-results/refine-results/faceting/).
 
-        Facets are ways to categorize search results based on attributes.
-        Facets can be used to let user filter search results.
+        Facets are attributes that let you categorize search results.
+        They can be used for filtering search results.
         By default, no attribute is used for faceting.
+        Attribute names are case-sensitive.
 
         **Modifiers**
 
@@ -84,6 +85,7 @@ baseIndexSettings:
 
         This can be useful if you want to use an attribute for ranking or to [restrict access](https://www.algolia.com/doc/guides/security/api-keys/how-to/user-restricted-access-to-data/),
         but don't want to include it in the search results.
+        Attribute names are case-sensitive.
       default: []
       x-categories:
         - Attributes
@@ -106,6 +108,7 @@ baseIndexSettings:
 
         Transliteration supports searching in any of the Japanese writing systems.
         To support transliteration, you must set the indexing language to Japanese.
+        Attribute names are case-sensitive.
       type: array
       items:
         type: string
@@ -119,7 +122,9 @@ baseIndexSettings:
       items:
         type: string
       example: [description]
-      description: Attributes for which to split [camel case](https://wikipedia.org/wiki/Camel_case) words.
+      description: |
+        Attributes for which to split [camel case](https://wikipedia.org/wiki/Camel_case) words.
+        Attribute names are case-sensitive.
       default: []
       x-categories:
         - Languages
@@ -130,6 +135,7 @@ baseIndexSettings:
           - name
       description: |
         Searchable attributes to which Algolia should apply [word segmentation](https://www.algolia.com/doc/guides/managing-results/optimize-search-results/handling-natural-languages-nlp/how-to/customize-segmentation/) (decompounding).
+        Attribute names are case-sensitive.
 
         Compound words are formed by combining two or more individual words,
         and are particularly prevalent in Germanic languages—for example, "firefighter".
@@ -164,7 +170,9 @@ baseIndexSettings:
         type: string
       example:
         - sku
-      description: Searchable attributes for which you want to turn off [prefix matching](https://www.algolia.com/doc/guides/managing-results/optimize-search-results/override-search-engine-defaults/#adjusting-prefix-search).
+      description: |
+        Searchable attributes for which you want to turn off [prefix matching](https://www.algolia.com/doc/guides/managing-results/optimize-search-results/override-search-engine-defaults/#adjusting-prefix-search).
+        Attribute names are case-sensitive.
       default: []
       x-categories:
         - Query strategy
@@ -182,6 +190,7 @@ baseIndexSettings:
         type: string
       description: |
         Numeric attributes that can be used as [numerical filters](https://www.algolia.com/doc/guides/managing-results/rules/detecting-intent/how-to/applying-a-custom-filter-for-a-specific-query/#numerical-filters).
+        Attribute names are case-sensitive.
 
         By default, all numeric attributes are available as numerical filters.
         For faster indexing, reduce the number of numeric attributes.
@@ -221,7 +230,7 @@ baseIndexSettings:
         - unordered(text)
         - emails.personal
       description: |
-        Attributes used for searching.
+        Attributes used for searching. Attribute names are case-sensitive.
 
         By default, all attributes are searchable and the [Attribute](https://www.algolia.com/doc/guides/managing-results/relevance-overview/in-depth/ranking-criteria/#attribute) ranking criterion is turned off.
         With a non-empty list, Algolia only returns results with matches in the selected attributes.
@@ -260,6 +269,7 @@ baseIndexSettings:
     attributeForDistinct:
       description: |
         Attribute that should be used to establish groups of results.
+        Attribute names are case-sensitive.
 
         All records with the same value for this attribute are considered a group.
         You can combine `attributeForDistinct` with the `distinct` search parameter to control
@@ -286,6 +296,7 @@ indexSettingsAsSearchParams:
         Attributes to include in the API response.
 
         To reduce the size of your response, you can retrieve only some of the attributes.
+        Attribute names are case-sensitive.
 
         - `*` retrieves all attributes, except attributes included in the `customRanking` and `unretrievableAttributes` settings.
         - To retrieve all attributes except a specific one, prefix the attribute with a dash and combine it with the `*`: `["*", "-ATTRIBUTE"]`.
@@ -335,6 +346,7 @@ indexSettingsAsSearchParams:
         - asc(price)
       description: |
         Attributes to use as [custom ranking](https://www.algolia.com/doc/guides/managing-results/must-do/custom-ranking/).
+        Attribute names are case-sensitive.
 
         The custom ranking attributes decide which items are shown first if the other ranking criteria are equal.
 
@@ -376,6 +388,7 @@ indexSettingsAsSearchParams:
 
         By default, all searchable attributes are highlighted.
         Use `*` to highlight all attributes or use an empty array `[]` to turn off highlighting.
+        Attribute names are case-sensitive.
 
         With highlighting, strings that match the search query are surrounded by HTML tags defined by `highlightPreTag` and `highlightPostTag`.
         You can use this to visually highlight matching parts of a search query in your UI.
@@ -392,6 +405,7 @@ indexSettingsAsSearchParams:
         - description
       description: |
         Attributes for which to enable snippets.
+        Attribute names are case-sensitive.
 
         Snippets provide additional context to matched words.
         If you enable snippets, they include 10 words, including the matched word.
@@ -461,6 +475,7 @@ indexSettingsAsSearchParams:
         - sku
       description: |
         Attributes for which you want to turn off [typo tolerance](https://www.algolia.com/doc/guides/managing-results/optimize-search-results/typo-tolerance/).
+        Attribute names are case-sensitive.
 
         Returning only exact matches can help when:
 
@@ -584,6 +599,7 @@ indexSettingsAsSearchParams:
         - description
       description: |
         Searchable attributes for which you want to [turn off the Exact ranking criterion](https://www.algolia.com/doc/guides/managing-results/optimize-search-results/override-search-engine-defaults/in-depth/adjust-exact-settings/#turn-off-exact-for-some-attributes).
+        Attribute names are case-sensitive.
 
         This can be useful for attributes with long values, where the likelyhood of an exact match is high,
         such as product descriptions.
@@ -741,7 +757,7 @@ maxFacetHits:
 
 reRankingApplyFilter:
   description: |
-    Restrict [Dynamic Re-ranking](https://www.algolia.com/doc/guides/algolia-ai/re-ranking/) to records that match these filters.
+    Restrict [Dynamic Re-Ranking](https://www.algolia.com/doc/guides/algolia-ai/re-ranking/) to records that match these filters.
   oneOf:
     - $ref: './SearchParams.yml#/listOfSearchFilters'
     - type: string
diff --git a/specs/common/schemas/SearchParams.yml b/specs/common/schemas/SearchParams.yml
index 017c19ab50..2f6a415bdd 100644
--- a/specs/common/schemas/SearchParams.yml
+++ b/specs/common/schemas/SearchParams.yml
@@ -5,6 +5,7 @@ searchParams:
 
 searchParamsObject:
   title: Search parameters as object
+  description: Each parameter value, including the `query` must not be larger than 512 bytes.
   allOf:
     - $ref: '#/baseSearchParams'
     - $ref: '../../common/schemas/IndexSettings.yml#/indexSettingsAsSearchParams'
@@ -69,7 +70,9 @@ baseSearchParamsWithoutQuery:
       items:
         type: string
       example: [title, author]
-      description: Restricts a search to a subset of your searchable attributes.
+      description: |
+        Restricts a search to a subset of your searchable attributes.
+        Attribute names are case-sensitive.
       default: []
       x-categories:
         - Filtering
@@ -132,7 +135,7 @@ baseSearchParamsWithoutQuery:
     naturalLanguages:
       type: array
       items:
-        type: string
+        $ref: './IndexSettings.yml#/supportedLanguage'
       description: |
         ISO language codes that adjust settings that are useful for processing natural language queries (as opposed to keyword searches):
 
@@ -335,9 +338,9 @@ insideBoundingBox:
   type: array
   items:
     type: array
+    minItems: 4
+    maxItems: 4
     items:
-      minItems: 4
-      maxItems: 4
       type: number
       format: double
   description: |
@@ -357,9 +360,9 @@ insidePolygon:
   type: array
   items:
     type: array
+    minItems: 6
+    maxItems: 20000
     items:
-      minItems: 6
-      maxItems: 20000
       type: number
       format: double
   description: |
@@ -368,7 +371,7 @@ insidePolygon:
     Polygons are defined by 3 to 10,000 points. Each point is represented by its latitude and longitude.
     Provide multiple polygons as nested arrays.
     For more information, see [filtering inside polygons](https://www.algolia.com/doc/guides/managing-results/refine-results/geolocation/#filtering-inside-rectangular-or-polygonal-areas).
-    This parameter is ignored, if you also specify `insideBoundingBox`.
+    This parameter is ignored if you also specify `insideBoundingBox`.
   example:
     - [47.3165, 4.9665, 47.3424, 5.0201, 47.32, 4.9]
     - [40.9234, 2.1185, 38.6430, 1.9916, 39.2587, 2.0104]
diff --git a/specs/ingestion/common/schemas/destination.yml b/specs/ingestion/common/schemas/destination.yml
index 3df3f6ebb5..b4b13a7311 100644
--- a/specs/ingestion/common/schemas/destination.yml
+++ b/specs/ingestion/common/schemas/destination.yml
@@ -128,7 +128,7 @@ DestinationIndexName:
   properties:
     indexName:
       type: string
-      description: Algolia index name.
+      description: Algolia index name (case-sensitive).
     recordType:
       $ref: '#/RecordType'
     attributesToExclude:
diff --git a/specs/insights/common/schemas/EventAttributes.yml b/specs/insights/common/schemas/EventAttributes.yml
index c7a4186e0d..b36bdc04ed 100644
--- a/specs/insights/common/schemas/EventAttributes.yml
+++ b/specs/insights/common/schemas/EventAttributes.yml
@@ -13,7 +13,7 @@ eventName:
 
 index:
   type: string
-  description: Index name to which the event's items belong.
+  description: Index name (case-sensitive) to which the event's items belong.
   example: YourIndexName
 
 userToken:
diff --git a/specs/query-suggestions/common/schemas/QuerySuggestionsConfiguration.yml b/specs/query-suggestions/common/schemas/QuerySuggestionsConfiguration.yml
index 73a79c4081..b8b335af11 100644
--- a/specs/query-suggestions/common/schemas/QuerySuggestionsConfiguration.yml
+++ b/specs/query-suggestions/common/schemas/QuerySuggestionsConfiguration.yml
@@ -69,7 +69,7 @@ SourceIndex:
   properties:
     indexName:
       type: string
-      description: Name of the Algolia index to use as source for query suggestions.
+      description: Name of the Algolia index (case-sensitive) to use as source for query suggestions.
       example: products
     replicas:
       type: boolean
diff --git a/specs/query-suggestions/common/schemas/QuerySuggestionsIndexName.yml b/specs/query-suggestions/common/schemas/QuerySuggestionsIndexName.yml
index eb889ad89b..43881b00e2 100644
--- a/specs/query-suggestions/common/schemas/QuerySuggestionsIndexName.yml
+++ b/specs/query-suggestions/common/schemas/QuerySuggestionsIndexName.yml
@@ -1,4 +1,4 @@
 title: indexName
 type: string
-description: Name of the Query Suggestions index.
+description: Name of the Query Suggestions index (case-sensitive).
 example: products_query_suggestions
diff --git a/specs/search/paths/objects/multipleBatch.yml b/specs/search/paths/objects/multipleBatch.yml
index db4ef88867..33fba3b753 100644
--- a/specs/search/paths/objects/multipleBatch.yml
+++ b/specs/search/paths/objects/multipleBatch.yml
@@ -31,9 +31,7 @@ post:
                     type: object
                     description: Operation arguments (varies with specified `action`).
                   indexName:
-                    type: string
-                    description: Index to target for this operation.
-                    example: 'index1'
+                    $ref: '../../../common/parameters.yml#/indexName'
                 required:
                   - action
                   - body
diff --git a/tests/CTS/requests/search/search.json b/tests/CTS/requests/search/search.json
index 1cd86bf182..6f7329a7ea 100644
--- a/tests/CTS/requests/search/search.json
+++ b/tests/CTS/requests/search/search.json
@@ -443,7 +443,7 @@
           "minWordSizefor2Typos": 0,
           "minimumAroundRadius": 1,
           "naturalLanguages": [
-            ""
+            "fr"
           ],
           "numericFilters": [
             ""
@@ -618,7 +618,7 @@
             "minWordSizefor2Typos": 0,
             "minimumAroundRadius": 1,
             "naturalLanguages": [
-              ""
+              "fr"
             ],
             "numericFilters": [
               ""