diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/Container.kt b/src/commonMain/kotlin/net/sergeych/crypto2/Container.kt
index c018f24..b19328f 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/Container.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/Container.kt
@@ -153,14 +153,27 @@ sealed class Container {
         }
     }
 
+    /**
+     * Add one or more recipients to the __decrypted__ container using a standard builder. Note that
+     * [Builder.fill] is not working in this case.
+     */
     fun addRecipients(builder: Builder.() -> Unit): Container =
         if (this is Single) asOpenMulti.addRecipients(builder)
         else {
             Builder(this).apply(builder).build()
         }
 
+    /**
+     * Add e key to the __decrypted__ container
+     */
     operator fun plus(recipient: Asymmetric.PublicKey) = addRecipients { key(recipient) }
+    /**
+     * Add e key to the __decrypted__ container
+     */
     operator fun plus(recipient: EncryptingKey) = addRecipients { key(recipient) }
+    /**
+     * Add e sender -> recipient asymmetric keys pair key to the  __decrypted__ container
+     */
     operator fun plus(pair: Pair<Asymmetric.SecretKey,Asymmetric.PublicKey>) = addRecipients { key(pair) }
 
     /**