{
  "id": "core-03-tool-call-ok",
  "title": "Valid tool call returns ok:true with echo call_id",
  "category": "core",
  "version": "aicc/0.1",
  "description": "A tool registered in the manifest must execute and return ok:true, echoing the caller's call_id.",
  "steps": [
    {
      "send": {
        "type": "tool_call",
        "tool": "echo",
        "input": {"value": "hello"}
      }
    },
    {
      "expect": {
        "type": "tool_result",
        "ok": true,
        "call_id_echo": true,
        "output": {"value": "hello"}
      }
    }
  ]
}