fix: tool calling cohere (#3355)

* Add support for tool calling cohere

* update tool calling code

* make client name configurable with default

* formatting nits

* update docs

---------

Co-authored-by: Mark Sze <66362098+marklysze@users.noreply.github.com>
Co-authored-by: Li Jiang <bnujli@gmail.com>

autogen/oai/cohere.py

@@ -6,6 +6,7 @@ Example:
             "api_type": "cohere",
             "model": "command-r-plus",
             "api_key": os.environ.get("COHERE_API_KEY")
+            "client_name": "autogen-cohere", # Optional parameter
             }
     ]}
 
@@ -144,7 +145,7 @@ class CohereClient:
     def create(self, params: Dict) -> ChatCompletion:
 
         messages = params.get("messages", [])
-
+        client_name = params.get("client_name") or "autogen-cohere"
         # Parse parameters to the Cohere API's parameters
         cohere_params = self.parse_params(params)
 
@@ -156,7 +157,7 @@ class CohereClient:
         cohere_params["preamble"] = preamble
 
         # We use chat model by default
-        client = Cohere(api_key=self.api_key)
+        client = Cohere(api_key=self.api_key, client_name=client_name)
 
         # Token counts will be returned
         prompt_tokens = 0
@@ -285,6 +286,23 @@ class CohereClient:
         return response_oai
 
 
+def extract_to_cohere_tool_results(tool_call_id: str, content_output: str, all_tool_calls) -> List[Dict[str, Any]]:
+    temp_tool_results = []
+
+    for tool_call in all_tool_calls:
+        if tool_call["id"] == tool_call_id:
+
+            call = {
+                "name": tool_call["function"]["name"],
+                "parameters": json.loads(
+                    tool_call["function"]["arguments"] if not tool_call["function"]["arguments"] == "" else "{}"
+                ),
+            }
+            output = [{"value": content_output}]
+            temp_tool_results.append(ToolResult(call=call, outputs=output))
+    return temp_tool_results
+
+
 def oai_messages_to_cohere_messages(
     messages: list[Dict[str, Any]], params: Dict[str, Any], cohere_params: Dict[str, Any]
 ) -> tuple[list[dict[str, Any]], str, str]:
@@ -352,7 +370,8 @@ def oai_messages_to_cohere_messages(
     # 'content' field renamed to 'message'
     # tools go into tools parameter
     # tool_results go into tool_results parameter
-    for message in messages:
+    messages_length = len(messages)
+    for index, message in enumerate(messages):
 
         if "role" in message and message["role"] == "system":
             # System message
@@ -369,34 +388,34 @@ def oai_messages_to_cohere_messages(
             new_message = {
                 "role": "CHATBOT",
                 "message": message["content"],
-                # Not including tools in this message, may need to. Testing required.
+                "tool_calls": [
+                    {
+                        "name": tool_call_.get("function", {}).get("name"),
+                        "parameters": json.loads(tool_call_.get("function", {}).get("arguments") or "null"),
+                    }
+                    for tool_call_ in message["tool_calls"]
+                ],
             }
 
             cohere_messages.append(new_message)
         elif "role" in message and message["role"] == "tool":
-            if "tool_call_id" in message:
-                # Convert the tool call to a result
+            if not (tool_call_id := message.get("tool_call_id")):
+                continue
 
-                tool_call_id = message["tool_call_id"]
-                content_output = message["content"]
+            # Convert the tool call to a result
+            content_output = message["content"]
+            tool_results_chat_turn = extract_to_cohere_tool_results(tool_call_id, content_output, tool_calls)
+            if (index == messages_length - 1) or (messages[index + 1].get("role", "").lower() in ("user", "tool")):
+                # If the tool call is the last message or the next message is a user/tool message, this is a recent tool call.
+                # So, we pass it into tool_results.
+                tool_results.extend(tool_results_chat_turn)
+                continue
 
-                # Find the original tool
-                for tool_call in tool_calls:
-                    if tool_call["id"] == tool_call_id:
+            else:
+                # If its not the current tool call, we pass it as a tool message in the chat history.
+                new_message = {"role": "TOOL", "tool_results": tool_results_chat_turn}
+                cohere_messages.append(new_message)
 
-                        call = {
-                            "name": tool_call["function"]["name"],
-                            "parameters": json.loads(
-                                tool_call["function"]["arguments"]
-                                if not tool_call["function"]["arguments"] == ""
-                                else "{}"
-                            ),
-                        }
-                        output = [{"value": content_output}]
-
-                        tool_results.append(ToolResult(call=call, outputs=output))
-
-                        break
         elif "content" in message and isinstance(message["content"], str):
             # Standard text message
             new_message = {
@@ -416,7 +435,7 @@ def oai_messages_to_cohere_messages(
         # If we're adding tool_results, like we are, the last message can't be a USER message
         # So, we add a CHATBOT 'continue' message, if so.
         # Changed key from "content" to "message" (jaygdesai/autogen_Jay)
-        if cohere_messages[-1]["role"] == "USER":
+        if cohere_messages[-1]["role"].lower() == "user":
             cohere_messages.append({"role": "CHATBOT", "message": "Please continue."})
 
         # We return a blank message when we have tool results

website/docs/topics/non-openai-models/cloud-cohere.ipynb

@@ -100,6 +100,7 @@
     "- seed (null, integer)\n",
     "- frequency_penalty (number 0..1)\n",
     "- presence_penalty (number 0..1)\n",
+    "- client_name (null, string)\n",
     "\n",
     "Example:\n",
     "```python\n",
@@ -108,6 +109,7 @@
     "        \"model\": \"command-r\",\n",
     "        \"api_key\": \"your Cohere API Key goes here\",\n",
     "        \"api_type\": \"cohere\",\n",
+    "        \"client_name\": \"autogen-cohere\",\n",
     "        \"temperature\": 0.5,\n",
     "        \"p\": 0.2,\n",
     "        \"k\": 100,\n",
@@ -526,7 +528,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.11.9"
+   "version": "3.12.5"
   }
  },
  "nbformat": 4,