Gate tool-gateway behind an env var, so it's not in users' faces until we're ready. Even if users enable it, it'll be blocked server-side for now, until we unlock for non-admin users on tool-gateway.

agent/prompt_builder.py

@@ -426,10 +426,14 @@ def build_nous_subscription_prompt(valid_tool_names: "set[str] | None" = None) -
     """Build a compact Nous subscription capability block for the system prompt."""
     try:
         from hermes_cli.nous_subscription import get_nous_subscription_features
+        from tools.tool_backend_helpers import managed_nous_tools_enabled
     except Exception as exc:
         logger.debug("Failed to import Nous subscription helper: %s", exc)
         return ""
 
+    if not managed_nous_tools_enabled():
+        return ""
+
     valid_names = set(valid_tool_names or set())
     relevant_tool_names = {
         "web_search",