diff --git a/backend/agent_tools.py b/backend/agent_tools.py
index 535b774..9d81e43 100644
--- a/backend/agent_tools.py
+++ b/backend/agent_tools.py
@@ -190,7 +190,7 @@ SHELL_READ_ONLY_COMMANDS: dict[str, set[str] | None] = {
     },
     "journalctl": None,  # 只读，任意参数 (-u, -n, --no-pager, --since 等)
     "crictl": {"ps", "inspect", "logs", "info", "version", "images", "stats"},
-    "ctr": {"containers", "images", "namespaces", "tasks", "snapshots", "info", "version", "plugins", "content", "leases"},
+    "ctr": None,
     "nerdctl": {"ps", "logs", "inspect", "info", "version", "images", "stats", "top", "events", "system", "namespace", "network", "volume"},
     "docker": {"ps", "logs", "inspect", "stats", "version", "info", "images", "top"},
     "df": None, "du": None, "free": None, "uptime": None, "uname": None, "hostname": None,