diff --git a/src/tools/prompts.js b/src/tools/prompts.js
index 345caf6..55b3409 100644
--- a/src/tools/prompts.js
+++ b/src/tools/prompts.js
@@ -102,7 +102,9 @@ export const TOOL_DESCRIPTIONS = {
     subagent:
         'Delegate a task to an isolated subagent. Pre-loads requested SKILL files into its ' +
         'system prompt and returns a compact summary of tool executions alongside the final output. ' +
-        'Subagents can call all tools you can call except subagent, ask_user and set_user_route',
+        'Subagents can call all tools you can call except subagent, ask_user and set_user_route.' +
+        'To efficently communicate with sugagents store the input and output data in vfs files ' +
+        'and provide these paths in the subagent instrcutions.'
 };
 
 // #endregion