feat(call-forwarding): update doc to incentivize use of dashboard

Author: goosewin

fern/call-forwarding.mdx

@@ -18,9 +18,21 @@ Vapi's call forwarding functionality allows you to redirect calls to different p
 
 ## Setting Up Call Forwarding
 
-### 1. Defining Destinations and Messages
+### 1. Create a Transfer Call Tool in the Dashboard
 
-The `transferCall` tool includes a list of destinations and corresponding messages to notify the caller:
+The recommended approach is to create your transfer call tool in the Vapi dashboard:
+
+1. Navigate to **Tools** in your Vapi dashboard
+2. Click **Create Tool**
+3. Select **Transfer Call** as the tool type
+4. Configure your destinations:
+   - **Department A**: `+1234567890` with message "I am forwarding your call to Department A. Please stay on the line."
+   - **Department B**: `+0987654321` with message "I am forwarding your call to Department B. Please stay on the line."
+   - **Department C**: `+1122334455` with message "I am forwarding your call to Department C. Please stay on the line."
+
+### 2. Alternative: API Configuration
+
+You can also define the tool via API with destinations and corresponding messages:
 
 ```json
 {
@@ -112,7 +124,7 @@ You can also specify the `extension` parameter to forward the call to an extensi
     ]
 ```
 
-### 2. Using the `transferCall` Function
+### 3. Using the `transferCall` Function
 
 When the assistant needs to forward a call, it uses the `transferCall` function with the appropriate destination:
 
@@ -127,7 +139,7 @@ When the assistant needs to forward a call, it uses the `transferCall` function
 }
 ```
 
-### 3. Customizing Messages
+### 4. Customizing Messages
 
 Customize the messages for each destination to provide clear information to the caller: