updated live control documentation.

Signed-off-by: sahil suman <[email protected]>

Author: sahilsuman933

fern/calls/call-features.mdx

@@ -57,23 +57,77 @@ curl 'https://api.vapi.ai/call'
 
 ```
 
-## Call Control Feature
+## Call Control Features
 
-Once you have the `controlUrl`, you can inject a message into the live call using a POST request. This can be done by sending a JSON payload to the `controlUrl`.
+Once you have the `controlUrl`, you can use various control features during a live call. Here are all the available control options:
 
-### Example: Injecting a Message
+### 1. Say Message
+Makes the assistant say a specific message during the call.
 
 ```bash
 curl -X POST 'https://aws-us-west-2-production1-phone-call-websocket.vapi.ai/7420f27a-30fd-4f49-a995-5549ae7cc00d/control' 
 -H 'content-type: application/json' 
 --data-raw '{
   "type": "say",
-  "message": "Welcome to Vapi, this message was injected during the call."
+  "content": "Welcome to Vapi, this message was injected during the call.",
+  "endCallAfterSpoken": false
 }'
+```
+
+### 2. Add Message to Conversation
+Adds a message to the conversation history and optionally triggers a response.
+
+```bash
+curl -X POST 'https://aws-us-west-2-production1-phone-call-websocket.vapi.ai/7420f27a-30fd-4f49-a995-5549ae7cc00d/control' 
+-H 'content-type: application/json' 
+--data-raw '{
+  "type": "add-message",
+  "message": {
+    "role": "system",
+    "content": "New message added to conversation"
+  },
+  "triggerResponseEnabled": true
+}'
+```
+
+### 3. Assistant Control
+Control the assistant's behavior during the call.
+
+```bash
+curl -X POST 'https://aws-us-west-2-production1-phone-call-websocket.vapi.ai/7420f27a-30fd-4f49-a995-5549ae7cc00d/control' 
+-H 'content-type: application/json' 
+--data-raw '{
+  "type": "control",
+  "control": "mute-assistant"  // Options: "mute-assistant", "unmute-assistant", "say-first-message"
+}'
+```
 
+### 4. End Call
+Programmatically end the ongoing call.
+
+```bash
+curl -X POST 'https://aws-us-west-2-production1-phone-call-websocket.vapi.ai/7420f27a-30fd-4f49-a995-5549ae7cc00d/control' 
+-H 'content-type: application/json' 
+--data-raw '{
+  "type": "end-call"
+}'
 ```
 
-The message will be spoken in real-time during the ongoing call.
+### 5. Transfer Call
+Transfer the call to a different destination.
+
+```bash
+curl -X POST 'https://aws-us-west-2-production1-phone-call-websocket.vapi.ai/7420f27a-30fd-4f49-a995-5549ae7cc00d/control' 
+-H 'content-type: application/json' 
+--data-raw '{
+  "type": "transfer",
+  "destination": {
+    "type": "number",
+    "number": "+1234567890"
+  },
+  "content": "Transferring your call now"
+}'
+```
 
 ## Call Listen Feature