Ollama 支援工具呼叫（也稱為函式呼叫），這允許模型呼叫工具並將其結果整合到回覆中。

呼叫單一工具

呼叫單一工具並將其回應包含在後續請求中。

也稱為「單次」工具呼叫。

cURL

```shell
curl -s http://localhost:11434/api/chat -H "Content-Type: application/json" -d '{
  "model": "qwen3",
  "messages": [{"role": "user", "content": "What is the temperature in New York?"}],
  "stream": false,
  "tools": [
    {
      "type": "function",
      "function": {
        "name": "get_temperature",
        "description": "Get the current temperature for a city",
        "parameters": {
          "type": "object",
          "required": ["city"],
          "properties": {
            "city": {"type": "string", "description": "The name of the city"}
          }
        }
      }
    }
  ]
}'
```

**使用單一工具結果產生回應**
```shell
curl -s http://localhost:11434/api/chat -H "Content-Type: application/json" -d '{
  "model": "qwen3",
  "messages": [
    {"role": "user", "content": "What is the temperature in New York?"},
    {
      "role": "assistant",
      "tool_calls": [
        {
          "type": "function",
          "function": {
            "index": 0,
            "name": "get_temperature",
            "arguments": {"city": "New York"}
          }
        }
      ]
    },
    {"role": "tool", "tool_name": "get_temperature", "content": "22°C"}
  ],
  "stream": false
}'
```

Python

安裝 Ollama Python SDK：
```bash
# with pip
pip install ollama -U

# with uv
uv add ollama
```

```python
from ollama import chat

def get_temperature(city: str) -> str:
  """取得城市的目前溫度

  參數：
    city: 城市名稱

  回傳：
    該城市的目前溫度
  """
  temperatures = {
    "New York": "22°C",
    "London": "15°C",
    "Tokyo": "18°C",
  }
  return temperatures.get(city, "Unknown")

messages = [{"role": "user", "content": "What is the temperature in New York?"}]

# 直接在 tools 清單中以函式形式傳遞工具，或以 JSON 結構描述形式傳遞
response = chat(model="qwen3", messages=messages, tools=[get_temperature], think=True)

messages.append(response.message)
if response.message.tool_calls:
  # 僅建議用於僅回傳單一工具呼叫的模型
  call = response.message.tool_calls[0]
  result = get_temperature(**call.function.arguments)
  # 將工具結果加入訊息中
  messages.append({"role": "tool", "tool_name": call.function.name, "content": str(result)})

  final_response = chat(model="qwen3", messages=messages, tools=[get_temperature], think=True)
  print(final_response.message.content)
```

JavaScript

安裝 Ollama JavaScript 程式庫：
```bash
# with npm
npm i ollama

# with bun
bun i ollama
```

```typescript
import ollama from 'ollama'

function getTemperature(city: string): string {
  const temperatures: Record<string, string> = {
    'New York': '22°C',
    'London': '15°C',
    'Tokyo': '18°C',
  }
  return temperatures[city] ?? 'Unknown'
}

const tools = [
  {
    type: 'function',
    function: {
      name: 'get_temperature',
      description: 'Get the current temperature for a city',
      parameters: {
        type: 'object',
        required: ['city'],
        properties: {
          city: { type: 'string', description: 'The name of the city' },
        },
      },
    },
  },
]

const messages = [{ role: 'user', content: "What is the temperature in New York?" }]

const response = await ollama.chat({
  model: 'qwen3',
  messages,
  tools,
  think: true,
})

messages.push(response.message)
if (response.message.tool_calls?.length) {
  // 僅建議用於僅回傳單一工具呼叫的模型
  const call = response.message.tool_calls[0]
  const args = call.function.arguments as { city: string }
  const result = getTemperature(args.city)
  // 將工具結果加入訊息中

  // 產生最終回應
  const finalResponse = await ollama.chat({ model: 'qwen3', messages, tools, think: true })
  console.log(finalResponse.message.content)
}
```

並行工具呼叫

cURL

並行請求多個工具呼叫，然後將所有工具的回應傳回模型。

```shell
curl -s http://localhost:11434/api/chat -H "Content-Type: application/json" -d '{
  "model": "qwen3",
  "messages": [{"role": "user", "content": "What are the current weather conditions and temperature in New York and London?"}],
  "stream": false,
  "tools": [
    {
      "type": "function",
      "function": {
        "name": "get_temperature",
        "description": "Get the current temperature for a city",
        "parameters": {
          "type": "object",
          "required": ["city"],
          "properties": {
            "city": {"type": "string", "description": "The name of the city"}
          }
        }
      }
    },
    {
      "type": "function",
      "function": {
        "name": "get_conditions",
        "description": "Get the current weather conditions for a city",
        "parameters": {
          "type": "object",
          "required": ["city"],
          "properties": {
            "city": {"type": "string", "description": "The name of the city"}
          }
        }
      }
    }
  ]
}'
```

**使用多個工具結果產生回應**
```shell
curl -s http://localhost:11434/api/chat -H "Content-Type: application/json" -d '{
  "model": "qwen3",
  "messages": [
    {"role": "user", "content": "What are the current weather conditions and temperature in New York and London?"},
    {
      "role": "assistant",
      "tool_calls": [
        {
          "type": "function",
          "function": {
            "index": 0,
            "name": "get_temperature",
            "arguments": {"city": "New York"}
          }
        },
        {
          "type": "function",
          "function": {
            "index": 1,
            "name": "get_conditions",
            "arguments": {"city": "New York"}
          }
        },
        {
          "type": "function",
          "function": {
            "index": 2,
            "name": "get_temperature",
            "arguments": {"city": "London"}
          }
        },
        {
          "type": "function",
          "function": {
            "index": 3,
            "name": "get_conditions",
            "arguments": {"city": "London"}
          }
        }
      ]
    },
    {"role": "tool", "tool_name": "get_temperature", "content": "22°C"},
    {"role": "tool", "tool_name": "get_conditions", "content": "Partly cloudy"},
    {"role": "tool", "tool_name": "get_temperature", "content": "15°C"},
    {"role": "tool", "tool_name": "get_conditions", "content": "Rainy"}
  ],
  "stream": false
}'
```

Python

```python
from ollama import chat

def get_temperature(city: str) -> str:
  """取得城市的目前溫度

  參數:
    city: 城市名稱

  回傳值:
    該城市的目前溫度
  """
  temperatures = {
    "New York": "22°C",
    "London": "15°C",
    "Tokyo": "18°C"
  }
  return temperatures.get(city, "Unknown")

def get_conditions(city: str) -> str:
  """取得城市的目前天氣狀況

  參數:
    city: 城市名稱

  回傳值:
    該城市的目前天氣狀況
  """
  conditions = {
    "New York": "Partly cloudy",
    "London": "Rainy",
    "Tokyo": "Sunny"
  }
  return conditions.get(city, "Unknown")


messages = [{'role': 'user', 'content': 'What are the current weather conditions and temperature in New York and London?'}]

# Python 客戶端會自動將函式解析為工具結構描述，因此我們可以直接傳遞它們
# 結構描述也可以直接傳遞到 tools 列表中
response = chat(model='qwen3', messages=messages, tools=[get_temperature, get_conditions], think=True)

# 將助手訊息加入 messages 中
messages.append(response.message)
if response.message.tool_calls:
  # 處理每個工具呼叫
  for call in response.message.tool_calls:
    # 執行對應的工具
    if call.function.name == 'get_temperature':
      result = get_temperature(**call.function.arguments)
    elif call.function.name == 'get_conditions':
      result = get_conditions(**call.function.arguments)
    else:
      result = 'Unknown tool'
    # 將工具結果加入 messages 中
    messages.append({'role': 'tool',  'tool_name': call.function.name, 'content': str(result)})

  # 產生最終回應
  final_response = chat(model='qwen3', messages=messages, tools=[get_temperature, get_conditions], think=True)
  print(final_response.message.content)
```

JavaScript

```typescript
import ollama from 'ollama'

function getTemperature(city: string): string {
  const temperatures: { [key: string]: string } = {
    "New York": "22°C",
    "London": "15°C",
    "Tokyo": "18°C"
  }
  return temperatures[city] || "Unknown"
}

function getConditions(city: string): string {
  const conditions: { [key: string]: string } = {
    "New York": "Partly cloudy",
    "London": "Rainy",
    "Tokyo": "Sunny"
  }
  return conditions[city] || "Unknown"
}

const tools = [
  {
    type: 'function',
    function: {
      name: 'get_temperature',
      description: 'Get the current temperature for a city',
      parameters: {
        type: 'object',
        required: ['city'],
        properties: {
          city: { type: 'string', description: 'The name of the city' },
        },
      },
    },
  },
  {
    type: 'function',
    function: {
      name: 'get_conditions',
      description: 'Get the current weather conditions for a city',
      parameters: {
        type: 'object',
        required: ['city'],
        properties: {
          city: { type: 'string', description: 'The name of the city' },
        },
      },
    },
  }
]

const messages = [{ role: 'user', content: 'What are the current weather conditions and temperature in New York and London?' }]

const response = await ollama.chat({
  model: 'qwen3',
  messages,
  tools,
  think: true
})

// 將助手訊息加入 messages 中
messages.push(response.message)
if (response.message.tool_calls) {
  // 處理每個工具呼叫
  for (const call of response.message.tool_calls) {
    // 執行對應的工具
    let result: string
    if (call.function.name === 'get_temperature') {
      const args = call.function.arguments as { city: string }
      result = getTemperature(args.city)
    } else if (call.function.name === 'get_conditions') {
      const args = call.function.arguments as { city: string }
      result = getConditions(args.city)
    } else {
      result = 'Unknown tool'
    }
    // 將工具結果加入 messages 中
    messages.push({ role: 'tool', tool_name: call.function.name, content: result })
  }

  // 產生最終回應
  const finalResponse = await ollama.chat({ model: 'qwen3', messages, tools, think: true })
  console.log(finalResponse.message.content)
}
```

多輪工具呼叫（Agent 迴圈）

Agent 迴圈允許模型決定何時呼叫工具，並將其結果整合到回覆中。

告知模型它正處於迴圈中且可以進行多次工具呼叫，也會有所幫助。

Python

```python
from ollama import chat, ChatResponse


def add(a: int, b: int) -> int:
  """將兩個數字相加"""
  """
  Args:
    a: 第一個數字
    b: 第二個數字

  Returns:
    兩個數字的總和
  """
  return a + b


def multiply(a: int, b: int) -> int:
  """將兩個數字相乘"""
  """
  Args:
    a: 第一個數字
    b: 第二個數字

  Returns:
    兩個數字的乘積
  """
  return a * b


available_functions = {
  'add': add,
  'multiply': multiply,
}

messages = [{'role': 'user', 'content': 'What is (11434+12341)*412?'}]
while True:
    response: ChatResponse = chat(
        model='qwen3',
        messages=messages,
        tools=[add, multiply],
        think=True,
    )
    messages.append(response.message)
    print("Thinking: ", response.message.thinking)
    print("Content: ", response.message.content)
    if response.message.tool_calls:
        for tc in response.message.tool_calls:
            if tc.function.name in available_functions:
                print(f"Calling {tc.function.name} with arguments {tc.function.arguments}")
                result = available_functions[tc.function.name](./**tc.function.arguments)
                print(f"Result: {result}")
                # 將工具結果加入訊息中
                messages.append({'role': 'tool', 'tool_name': tc.function.name, 'content': str(result)})
    else:
        # 當沒有更多工具呼叫時結束迴圈
        break
  # 使用更新後的訊息繼續迴圈
```

JavaScript

```typescript
import ollama from 'ollama'

type ToolName = 'add' | 'multiply'

function add(a: number, b: number): number {
  return a + b
}

function multiply(a: number, b: number): number {
  return a * b
}

const availableFunctions: Record<ToolName, (a: number, b: number) => number> = {
  add,
  multiply,
}

const tools = [
  {
    type: 'function',
    function: {
      name: 'add',
      description: 'Add two numbers',
      parameters: {
        type: 'object',
        required: ['a', 'b'],
        properties: {
          a: { type: 'integer', description: 'The first number' },
          b: { type: 'integer', description: 'The second number' },
        },
      },
    },
  },
  {
    type: 'function',
    function: {
      name: 'multiply',
      description: 'Multiply two numbers',
      parameters: {
        type: 'object',
        required: ['a', 'b'],
        properties: {
          a: { type: 'integer', description: 'The first number' },
          b: { type: 'integer', description: 'The second number' },
        },
      },
    },
  },
]

async function agentLoop() {
  const messages = [{ role: 'user', content: 'What is (11434+12341)*412?' }]

  while (true) {
    const response = await ollama.chat({
      model: 'qwen3',
      messages,
      tools,
      think: true,
    })

    messages.push(response.message)
    console.log('Thinking:', response.message.thinking)
    console.log('Content:', response.message.content)

    const toolCalls = response.message.tool_calls ?? []
    if (toolCalls.length) {
      for (const call of toolCalls) {
        const fn = availableFunctions[call.function.name as ToolName]
        if (!fn) {
          continue
        }

        const args = call.function.arguments as { a: number; b: number }
        console.log(`Calling ${call.function.name} with arguments`, args)
        const result = fn(args.a, args.b)
        console.log(`Result: ${result}`)
        messages.push({ role: 'tool', tool_name: call.function.name, content: String(result) })
      }
    } else {
      break
    }
  }
}

agentLoop().catch(console.error)
```

使用串流進行工具呼叫

使用串流時，收集 thinking、content 和 tool_calls 的每個區塊，然後在後續請求中將這些欄位與任何工具結果一起傳回。

Python

from ollama import chat


def get_temperature(city: str) -> str:
  """取得城市的目前溫度

  Args:
    city: 城市名稱

  Returns:
    城市的目前溫度
  """
  temperatures = {
    'New York': '22°C',
    'London': '15°C',
  }
  return temperatures.get(city, 'Unknown')


messages = [{'role': 'user', 'content': "What is the temperature in New York?"}]

while True:
  stream = chat(
    model='qwen3',
    messages=messages,
    tools=[get_temperature],
    stream=True,
    think=True,
  )

  thinking = ''
  content = ''
  tool_calls = []

  done_thinking = False
  # 累積部分欄位
  for chunk in stream:
    if chunk.message.thinking:
      thinking += chunk.message.thinking
      print(chunk.message.thinking, end='', flush=True)
    if chunk.message.content:
      if not done_thinking:
        done_thinking = True
        print('\n')
      content += chunk.message.content
      print(chunk.message.content, end='', flush=True)
    if chunk.message.tool_calls:
      tool_calls.extend(chunk.message.tool_calls)
      print(chunk.message.tool_calls)

  # 將累積的欄位附加到訊息中
  if thinking or content or tool_calls:
    messages.append({'role': 'assistant', 'thinking': thinking, 'content': content, 'tool_calls': tool_calls})

  if not tool_calls:
    break

  for call in tool_calls:
    if call.function.name == 'get_temperature':
      result = get_temperature(**call.function.arguments)
    else:
      result = 'Unknown tool'
    messages.append({'role': 'tool', 'tool_name': call.function.name, 'content': result})

JavaScript

function getTemperature(city: string): string {
  const temperatures: Record<string, string> = {
    'New York': '22°C',
    'London': '15°C',
  }
  return temperatures[city] ?? 'Unknown'
}

const getTemperatureTool = {
  type: 'function',
  function: {
    name: 'get_temperature',
    description: 'Get the current temperature for a city',
    parameters: {
      type: 'object',
      required: ['city'],
      properties: {
        city: { type: 'string', description: 'The name of the city' },
      },
    },
  },
}

async function agentLoop() {
  const messages = [{ role: 'user', content: "What is the temperature in New York?" }]

  while (true) {
    const stream = await ollama.chat({
      model: 'qwen3',
      messages,
      tools: [getTemperatureTool],
      stream: true,
      think: true,
    })

    let thinking = ''
    let content = ''
    const toolCalls: any[] = []
    let doneThinking = false

    for await (const chunk of stream) {
      if (chunk.message.thinking) {
        thinking += chunk.message.thinking
        process.stdout.write(chunk.message.thinking)
      }
      if (chunk.message.content) {
        if (!doneThinking) {
          doneThinking = true
          process.stdout.write('\n')
        }
        content += chunk.message.content
        process.stdout.write(chunk.message.content)
      }
      if (chunk.message.tool_calls?.length) {
        toolCalls.push(...chunk.message.tool_calls)
        console.log(chunk.message.tool_calls)
      }
    }

    if (thinking || content || toolCalls.length) {
      messages.push({ role: 'assistant', thinking, content, tool_calls: toolCalls } as any)
    }

    if (!toolCalls.length) {
      break
    }

    for (const call of toolCalls) {
      if (call.function.name === 'get_temperature') {
        const args = call.function.arguments as { city: string }
        const result = getTemperature(args.city)
        messages.push({ role: 'tool', tool_name: call.function.name, content: result } )
      } else {
        messages.push({ role: 'tool', tool_name: call.function.name, content: 'Unknown tool' } )
      }
    }
  }
}

agentLoop().catch(console.error)
    ```




此迴圈會串流助理的回應，累積部分欄位，將它們一起傳回，並附加工具結果，以便模型完成其回答。


## 使用 Ollama Python SDK 將函數作為工具
Python SDK 會自動將函數解析為工具結構描述，因此我們可以直接傳遞它們。如果需要，仍然可以傳遞結構描述。

```python
from ollama import chat

def get_temperature(city: str) -> str:
  """取得城市的目前溫度

  Args:
    city: 城市名稱

  Returns:
    城市的目前溫度
  """
  temperatures = {
    'New York': '22°C',
    'London': '15°C',
  }
  return temperatures.get(city, 'Unknown')

available_functions = {
  'get_temperature': get_temperature,
}
# 直接將函數作為工具列表的一部分傳遞
response = chat(model='qwen3', messages=messages, tools=available_functions.values(), think=True)