$ run_session_loop(..., tools=[WordCountTool()], executor=scripted)

[0] user
{
  "content": "Count the words in this sentence."
}
[1] assistant
{
  "content": null,
  "tool_calls": [
    {
      "id": "call_word_count",
      "type": "function",
      "function": {
        "name": "word_count",
        "arguments": "{\"text\": \"Session carries state and tools produce structured results.\"}"
      }
    }
  ]
}
[2] tool_result
{
  "tool_call_id": "call_word_count",
  "name": "word_count",
  "content": "{\"word_count\": 8, \"unique_words\": 8, \"session_backend\": \"local\"}"
}
[3] assistant
{
  "content": "The text has 8 words and 8 unique words.",
  "tool_calls": null
}