diff --git a/offline-backend-20260512/backend/packages/harness/deerflow/agents/middlewares/setup_agent_approval_middleware.py b/offline-backend-20260512/backend/packages/harness/deerflow/agents/middlewares/setup_agent_approval_middleware.py
index 3010aade..28ee54e3 100644
--- a/offline-backend-20260512/backend/packages/harness/deerflow/agents/middlewares/setup_agent_approval_middleware.py
+++ b/offline-backend-20260512/backend/packages/harness/deerflow/agents/middlewares/setup_agent_approval_middleware.py
@@ -67,6 +67,10 @@ class SetupAgentApprovalMiddleware(AgentMiddleware[SetupAgentApprovalMiddlewareS
 
         args = setup_call.get("args") or {}
         tool_call_id = setup_call.get("id") or ""
+
+        if isinstance(args.get("skills"), list) and len(args["skills"]) > 5:
+            args = {**args, "skills": args["skills"][:5]}
+
         payload = self._build_payload(args)
         logger.info("Setup agent approval requested before writing agent files")
 
diff --git a/offline-backend-20260512/backend/packages/harness/deerflow/tools/builtins/setup_agent_tool.py b/offline-backend-20260512/backend/packages/harness/deerflow/tools/builtins/setup_agent_tool.py
index aeb6a537..eafe09f3 100644
--- a/offline-backend-20260512/backend/packages/harness/deerflow/tools/builtins/setup_agent_tool.py
+++ b/offline-backend-20260512/backend/packages/harness/deerflow/tools/builtins/setup_agent_tool.py
@@ -27,7 +27,7 @@ def setup_agent(
         description: One-line description of what the agent does.
         name: Optional human-readable display name for the agent. If omitted,
             the agent's stable id is used as the display name.
-        skills: Optional list of skill names this agent should use. None or empty means no skills.
+        skills: Optional list of skill names this agent should use. None or empty means no skills. Maximum 5 skills allowed.
     """
 
     agent_name: str | None = (runtime.context.get("agent_id") or runtime.context.get("agent_name")) if runtime.context else None
@@ -48,7 +48,7 @@ def setup_agent(
             if description:
                 config_data["description"] = description
             if skills is not None:
-                config_data["skills"] = skills
+                config_data["skills"] = skills[:5]
 
             config_file = agent_dir / "config.yaml"
             with open(config_file, "w", encoding="utf-8") as f: