Add note about LLMChat limitation

Author: llowinge

docs/usage.md

@@ -254,6 +254,9 @@ The details below describe how Wanaku MCP router can be used with some prominent
 
 Wanaku Console includes simple LLMChat specificly designed for quick testing of the tools.
 
+> [!NOTE]
+> At the moment, the Embedded LLMChat supports only the tools.
+
 ```shell
 open http://localhost:8080
 ```
@@ -375,4 +378,4 @@ For those cases, leverage the `.proto` files in the `core-exchange` module for c
 
 > [!NOTE]
 > For plain Java, you can still generate the project using the archetype, but in this case, you must implement your own 
-delegate from scratch and adjust the dependencies.
+delegate from scratch and adjust the dependencies.