diff --git a/app/code/Magento/Inventory/Indexer/IndexHandlerInterface.php b/app/code/Magento/Inventory/Indexer/IndexHandlerInterface.php
index a78f4a259866..16e06c7b95f8 100644
--- a/app/code/Magento/Inventory/Indexer/IndexHandlerInterface.php
+++ b/app/code/Magento/Inventory/Indexer/IndexHandlerInterface.php
@@ -24,7 +24,8 @@ interface IndexHandlerInterface
     public function saveIndex(IndexName $indexName, \Traversable $documents, string $connectionName);
 
     /**
-     * Create the index i not exits or remove sku list from the index to rebuild
+     * Remove given documents from Index. For StockItem index we provide list of SKUs, aggregated Quantity
+     * for which should be re-calculated
      *
      * @param IndexName $indexName
      * @param \Traversable $documents
diff --git a/app/code/Magento/Inventory/Indexer/IndexStructureInterface.php b/app/code/Magento/Inventory/Indexer/IndexStructureInterface.php
index fa0ee5a4f1d9..01d053ec4aba 100644
--- a/app/code/Magento/Inventory/Indexer/IndexStructureInterface.php
+++ b/app/code/Magento/Inventory/Indexer/IndexStructureInterface.php
@@ -14,7 +14,7 @@
 interface IndexStructureInterface
 {
     /**
-     * Create the Index Structure if is not existing
+     * Create the Index Structure
      *
      * @param IndexName $indexName
      * @param string $connectionName
@@ -24,7 +24,7 @@ interface IndexStructureInterface
     public function create(IndexName $indexName, string $connectionName);
 
     /**
-     * Delete the given Index from the database
+     * Delete the given Index
      *
      * @param IndexName $indexName
      * @param string $connectionName
@@ -33,7 +33,7 @@ public function create(IndexName $indexName, string $connectionName);
     public function delete(IndexName $indexName, string $connectionName);
 
     /**
-     * Checks whether the Index exits.
+     * Checks whether the Index exits
      *
      * @param IndexName $indexName
      * @param string $connectionName