<!-- REASONING (not shown to user) -->
The user wants to travel from San Francisco to Tokyo.
The trip starts on May 10 and lasts for a week.
Budget for flights is $1200.
Budget for hotel is $200/night for 2 people.
The user wants to know the weather in Celsius.

Let's break down the tasks:
1. Get weather in Tokyo in Celsius.
2. Search for flights from San Francisco to Tokyo on May 10 with a max price of $1200.
3. Book a hotel in Tokyo from May 10 to May 17 (a week) for 2 guests with a max price of $200/night.

Wait, the prompt says "Output ONLY a JSON array of tool calls in the order you would make them."
The tools are:
- get_weather(city, units)
- search_flights(origin, dest, date, max_price_usd)
- book_hotel(city, checkin, checkout, guests, max_price_usd_per_night)

Let's determine the arguments for each tool:
1. get_weather:
   - city: "Tokyo"
   - units: "metric" (since the user wants Celsius)

2. search_flights:
   - origin: "San Francisco"
   - dest: "Tokyo"
   - date: "2024-05-10" (Wait, the year is not specified, but usually we assume the current or upcoming year. Let's use 2024-05-10 or just 2024-05-10. Actually, the prompt doesn't specify the year, but YYYY-MM-DD is required. I will use 2024-05-10 as a reasonable assumption, or maybe just 2024-05-10. Let's use 2024-05-10.)
   - max_price_usd: 1200

3. book_hotel:
   - city: "Tokyo"
   - checkin: "2024-05-10"
   - checkout: "2024-05-17" (a week starting May 10)
   - guests: 2
   - max_price_usd_per_night: 200

Wait, the prompt says "Output ONLY a JSON array of tool calls in the order you would make them. Each element must have keys 'tool' and 'args'. No prose, no code fence - just the raw JSON."

Let's format the JSON array.
[
  {
    "tool": "get_weather",
    "args": {
      "city": "Tokyo",
      "units": "metric"
    }
  },
  {
    "tool": "search_flights",
    "args": {
      "origin": "San Francisco",
      "dest": "Tokyo",
      "date": "2024-05-10",
      "max_price_usd": 1200
    }
  },
  {
    "tool": "book_hotel",
    "args": {
      "city": "Tokyo",
      "checkin": "2024-05-10",
      "checkout": "2024-05-17",
      "guests": 2,
      "max_price_usd_per_night": 200
    }
  }
]

Wait, should I use 2024 or 2025? Since the current year is 2024, 2024-05-10 is fine. If it's past May 10, 2024, maybe 2025? I'll just use 2024-05-10.

Let's double check the arguments.
get_weather(city: str, units: 'metric'|'imperial') -> city: "Tokyo", units: "metric"
search_flights(origin: str, dest: str, date: YYYY-MM-DD, max_price_usd: int) -> origin: "San Francisco", dest: "Tokyo", date: "2024-05-10", max_price_usd: 1200
book_hotel(city: str, checkin: YYYY-MM-DD, checkout: YYYY-MM-DD, guests: int, max_price_usd_per_night: int) -> city: "Tokyo", checkin: "2024-05-10", checkout: "2024-05-17", guests: 2, max_price_usd_per_night: 200

Looks correct.

<!-- ANSWER -->
[
  {
    "tool": "get_weather",
    "args": {
      "city": "Tokyo",
      "units": "metric"
    }
  },
  {
    "tool": "search_flights",
    "args": {
      "origin": "San Francisco",
      "dest": "Tokyo",
      "date": "2024-05-10",
      "max_price_usd": 1200
    }
  },
  {
    "tool": "book_hotel",
    "args": {
      "city": "Tokyo",
      "checkin": "2024-05-10",
      "checkout": "2024-05-17",
      "guests": 2,
      "max_price_usd_per_night": 200
    }
  }
]