Add example of transferCall tool with rejection plan configuration

Co-authored-by: sahil <[email protected]>

Author: cursoragent

fern/tools/tool-rejection-plan.mdx

@@ -142,6 +142,47 @@ Attach `rejectionPlan` directly on a tool in your assistant configuration (`mode
   }
 }
 ```
+
+### Another example: transferCall with rejection
+
+```json
+{
+  "model": {
+    "provider": "openai",
+    "model": "gpt-4o",
+    "messages": [
+      { "role": "system", "content": "Transfer only if the user clearly asks to be connected." }
+    ],
+    "tools": [
+      {
+        "type": "transferCall",
+        "destinations": [
+          { "type": "number", "number": "+1234567890" }
+        ],
+        "rejectionPlan": {
+          "conditions": [
+            {
+              "type": "group",
+              "operator": "OR",
+              "conditions": [
+                { "type": "regex", "regex": "(?i)\\bconnect\\b", "target": { "role": "user" } },
+                { "type": "regex", "regex": "(?i)\\btransfer\\b", "target": { "role": "user" } }
+              ]
+            },
+            {
+              "type": "regex",
+              "regex": "\\?",
+              "target": { "position": -1, "role": "user" },
+              "negate": true
+            }
+          ]
+        }
+      }
+    ]
+  }
+}
+```
+
 ## Tips
 
 - Escape backslashes in regex patterns: write `\\b` in JSON to mean `\b` in the regex engine.