feat: add managed tool gateway and Nous subscription support

- add managed modal and gateway-backed tool integrations\n- improve CLI setup, auth, and configuration for subscriber flows\n- expand tests and docs for managed tool support

tools/code_execution_tool.py

@@ -757,7 +757,8 @@ def build_execute_code_schema(enabled_sandbox_tools: set = None) -> dict:
         f"Available via `from hermes_tools import ...`:\n\n"
         f"{tool_lines}\n\n"
         "Limits: 5-minute timeout, 50KB stdout cap, max 50 tool calls per script. "
-        "terminal() is foreground-only (no background or pty).\n\n"
+        "terminal() is foreground-only (no background or pty). "
+        "If the session uses a cloud sandbox backend, treat it as resumable task state rather than a durable always-on machine.\n\n"
         "Print your final result to stdout. Use Python stdlib (json, re, math, csv, "
         "datetime, collections, etc.) for processing between tool calls.\n\n"
         "Also available (no import needed — built into hermes_tools):\n"