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: $DEEPSEEKAPIKEY" \
-H "content-type: application/json" \
-d '{
"model": "deepseek-v4-flash",
"maxtokens": 1024,
"tools": [
{
"type": "websearch20250305",
"name": "websearch",
"maxuses": 3
}
],
"messages": [
{
"role": "user",
"content": "deepseek-v5 定价如何？"
}
]
}' | jq