fix: change tos environment variable

Author: BhAem

veadk/tools/builtin_tools/execute_skills.py

@@ -91,8 +91,24 @@ def execute_skills(
         cmd.extend(["--skills"] + skills)
 
     # TODO: remove after agentkit supports custom environment variables setting
+    res = ve_request(
+        request_body={},
+        action="GetCallerIdentity",
+        ak=ak,
+        sk=sk,
+        service="sts",
+        version="2018-01-01",
+        region=region,
+        host="sts.volcengineapi.com",
+    )
+    try:
+        account_id = res["Result"]["AccountId"]
+    except KeyError as e:
+        logger.error(f"Error occurred while getting account id: {e}, response is {res}")
+        return res
+
     env_vars = {
-        "TOS_SKILLS_DIR": os.getenv("TOS_SKILLS_DIR"),
+        "TOS_SKILLS_DIR": f"tos://agentkit-platform-{account_id}/skills/",
         "TOOL_USER_SESSION_ID": tool_user_session_id,
     }