## Native tool protocol
The provider exposes tool definitions outside this prompt.
- Invoke tools only through the provider's native tool-calling channel.
- The current workflow/system prompt may mention only the tool names available for this stage; do not assume tools from earlier stages remain available.
- Do not write tool-call syntax by hand in assistant text, including text-mode tags, function-call snippets, Markdown code fences, or JSON tool-call envelopes.
- Keep assistant prose short and operational. {{ if done_sentinel }}When the task is complete and no more tool calls are needed, include `{{ done_sentinel }}` exactly once in assistant text.{{ else }}When the task is complete and no more tool calls are needed, give the final user-facing answer as plain assistant text and stop calling tools; that signals completion.{{ end }}