Utilisation efficace des outils en termes de jetons

curl https://api.anthropic.com/v1/messages \
  -H "content-type: application/json" \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "anthropic-beta: token-efficient-tools-2025-02-19" \
  -d '{
    "model": "claude-3-7-sonnet-20250219",
    "max_tokens": 1024,
    "tools": [
      {
        "name": "get_weather",
        "description": "Get the current weather in a given location",
        "input_schema": {
          "type": "object",
          "properties": {
            "location": {
              "type": "string",
              "description": "The city and state, e.g. San Francisco, CA"
            }
          },
          "required": [
            "location"
          ]
        }
      }
    ],
    "messages": [
      {
        "role": "user",
        "content": "Tell me the weather in San Francisco."
      }
    ]
  }' | jq '.usage'