diff --git a/core/lib/storage/src/chain/tree_cache/bincode_schema.rs b/core/lib/storage/src/chain/tree_cache/bincode_schema.rs
index 20dbf2c8c7..8dbae443bf 100644
--- a/core/lib/storage/src/chain/tree_cache/bincode_schema.rs
+++ b/core/lib/storage/src/chain/tree_cache/bincode_schema.rs
@@ -8,6 +8,8 @@ use super::records::AccountTreeCache;
 use crate::{QueryResult, StorageProcessor};
 
 /// Tree cache schema contains methods to store/load Merkle tree cache.
+///
+/// This schema is used to interact with caches encoded as *binary* data (using `bincode` protocol).
 #[derive(Debug)]
 pub struct TreeCacheSchemaBincode<'a, 'c>(pub &'a mut StorageProcessor<'c>);
 
diff --git a/core/lib/storage/src/chain/tree_cache/json_schema.rs b/core/lib/storage/src/chain/tree_cache/json_schema.rs
index 9150aba193..e4dd971cb5 100644
--- a/core/lib/storage/src/chain/tree_cache/json_schema.rs
+++ b/core/lib/storage/src/chain/tree_cache/json_schema.rs
@@ -8,6 +8,8 @@ use super::records::AccountTreeCache;
 use crate::{QueryResult, StorageProcessor};
 
 /// Tree cache schema contains methods to store/load Merkle tree cache.
+///
+/// This schema is used to interact with caches encoded as *JSON* data.
 #[derive(Debug)]
 pub struct TreeCacheSchemaJSON<'a, 'c>(pub &'a mut StorageProcessor<'c>);