[Docs] Improve reasoning_out docs (#4901)

* [Docs] Improve reasoning_out docs

* [Docs] Improve reasoning_out docs

* [Docs] Improve reasoning_out docs

---------

Co-authored-by: liqinrui <liqinrui@baidu.com>

docs/zh/features/reasoning_output.md

@@ -5,10 +5,11 @@
 思考模型在输出中返回 `reasoning_content` 字段，表示思考链内容,即得出最终结论的思考步骤.
 
 ##目前支持思考链的模型
-| 模型名称          | 解析器名称       | 默认开启思考链 |
-|---------------|-------------|---------|
-| baidu/ERNIE-4.5-VL-424B-A47B-Paddle  | ernie-45-vl | ✓       |
-| baidu/ERNIE-4.5-VL-28B-A3B-Paddle | ernie-45-vl |    ✓    |
+| 模型名称          | 解析器名称       | 默认开启思考链 | 工具调用  |
+|---------------|-------------|---------|---------|
+| baidu/ERNIE-4.5-VL-424B-A47B-Paddle  | ernie-45-vl | ✅       | ❌ |
+| baidu/ERNIE-4.5-VL-28B-A3B-Paddle | ernie-45-vl |    ✅    |  ❌  |
+| baidu/ERNIE-4.5-21B-A3B-Thinking  | ernie-x1  |   ✅不支持关思考  | ✅|
 
 思考模型需要指定解析器,以便于对思考内容进行解析. 通过 `"enable_thinking": false` 参数可以关闭模型思考模式.
 
@@ -83,3 +84,76 @@ for chunk in chat_response:
         print("\n")
 
 ```
+## 工具调用
+如果模型支持工具调用， 可以同时启动模型回复内容的思考链解析  `reasoning_content` 及工具解析 `tool-call-parser`。 工具内容仅从模型回复内容 `content` 中进行解析，而不会影响思考链内容。
+例如，
+```bash
+curl -X POST "http://0.0.0.0:8390/v1/chat/completions" \
+-H "Content-Type: application/json" \
+-d '{
+  "messages": [
+    {
+      "role": "user",
+      "content": "北京今天天气怎么样？"
+    }
+  ],
+  "tools": [
+    {
+      "type": "function",
+      "function": {
+        "name": "get_weather",
+        "description": "Determine weather in my location",
+        "parameters": {
+          "type": "object",
+          "properties": {
+            "location": {
+              "type": "string",
+              "description": "The city and state e.g. San Francisco, CA"
+            },
+            "unit": {
+              "type": "string",
+              "enum": [
+                "c",
+                "f"
+              ]
+            }
+          },
+          "additionalProperties": false,
+          "required": [
+            "location",
+            "unit"
+          ]
+        },
+        "strict": true
+      }
+    }],
+    "stream": false
+}'
+```
+返回结果示例如下：
+```json
+{
+    "choices": [
+        {
+            "index": 0,
+            "message": {
+                "role": "assistant",
+                "content": "",
+                "reasoning_content": "用户问的是..",
+                "tool_calls": [
+                    {
+                        "id": "chatcmpl-tool-311b9bda34274722afc654c55c8ce6a0",
+                        "type": "function",
+                        "function": {
+                            "name": "get_weather",
+                            "arguments": "{\"location\": \"北京\", \"unit\": \"c\"}"
+                        }
+                    }
+                ]
+            },
+            "finish_reason": "tool_calls"
+        }
+    ]
+}
+```
+更多工具调用相关的使用参考文档  [Tool Calling](./tool_calling.md)