diff --git a/server/src/main/java/org/opensearch/common/cache/policy/CachedQueryResult.java b/server/src/main/java/org/opensearch/common/cache/policy/CachedQueryResult.java
index fa14fd6d2823f..0a98542a05bb7 100644
--- a/server/src/main/java/org/opensearch/common/cache/policy/CachedQueryResult.java
+++ b/server/src/main/java/org/opensearch/common/cache/policy/CachedQueryResult.java
@@ -59,6 +59,10 @@ public void writeToNoId(StreamOutput out) throws IOException {
         qsr.writeToNoId(out);
     }
 
+    /**
+     * A class containing information needed for all cache policies
+     *  to decide whether to admit a given value.
+     */
     public static class PolicyValues implements Writeable {
         final long tookTimeNanos;
         // More values can be added here as they're needed for future policies