DeepSeek API 悄咪咪的提供 web search 功能， 但文档没有一丝说明

curl -sS https://api.deepseek.com/anthropic/v1/messages

-H "x-api-key: $DEEPSEEK_API_KEY" \
-H "content-type: application/json" \
-d '{
                "model": "deepseek-v4-flash",
                "max_tokens": 1024,
                "tools": [
                  {
                    "type": "web_search_20250305",
                    "name": "web_search",
                    "max_uses": 3
                  }
                ],
                "messages": [
                  {
                    "role": "user",
                    "content": "deepseek-v5 定价如何？"
                  }
                ]
              }' | jq