{% set tcalls = filter_by_type(msg.content_blocks, "tool_use") %}
{
  "role": "assistant",
  "content": {% if msg.content != "" %}{{ tojson(msg.content) }}{% else %}null{% endif %}
  {% if length(tcalls) > 0 %}
  , "tool_calls": [
    {% for b in tcalls %}
    {
      "id": {{ tojson(b.id) }},
      "type": "function",
      "function": {
        "name": {{ tojson(b.name) }},
        "arguments": {{ tojson(tojson(b.input)) }}
      }
    },
    {% endfor %}
  ]
  {% endif %}
},