{
  "scope": "Real isolated MCP regression probe on Blender4.5.14 and official adapter0.2.16/Core0.20.42; not a modification of the rendered native scene.",
  "failure": {
    "tool": "blender_rigging__set_driver",
    "arguments": {
      "object_name": "Typed Z Driver Probe",
      "data_path": "rotation_euler.z",
      "expression": "frame/10"
    },
    "success": false,
    "error_type": "ValueError",
    "error": "bpy_struct.driver_add(): path includes index, must be a separate argument"
  },
  "vector_fallback": {
    "tool": "blender_rigging__set_driver",
    "arguments": {
      "object_name": "Typed Z Driver Probe",
      "data_path": "rotation_euler",
      "expression": "frame/10"
    },
    "reported_success": true,
    "evaluated_frame": 10,
    "rotation": [
      1,
      0,
      0
    ],
    "created_drivers": [
      {
        "array_index": 0,
        "expression": "frame/10"
      },
      {
        "array_index": 1,
        "expression": "0.0"
      },
      {
        "array_index": 2,
        "expression": "0.0"
      }
    ]
  },
  "schema_limitation": "No array_index input; description offers component-path syntax such as location.x but native driver_add requires the component index separately.",
  "safe_production_route": "Official scripting escape hatch with driver_add(property,index), explicitly disclosed."
}