feat: Add end call reason in tool calls.

ui/src/app/tools/[toolUuid]/components/EndCallToolConfig.tsx

@@ -4,6 +4,7 @@ import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/com
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
 import { RadioGroup, RadioGroupItem } from "@/components/ui/radio-group";
+import { Switch } from "@/components/ui/switch";
 import { Textarea } from "@/components/ui/textarea";
 
 import { type EndCallMessageType } from "../../config";
@@ -17,6 +18,10 @@ export interface EndCallToolConfigProps {
     onMessageTypeChange: (messageType: EndCallMessageType) => void;
     customMessage: string;
     onCustomMessageChange: (message: string) => void;
+    endCallReason: boolean;
+    onEndCallReasonChange: (enabled: boolean) => void;
+    endCallReasonDescription: string;
+    onEndCallReasonDescriptionChange: (description: string) => void;
 }
 
 export function EndCallToolConfig({
@@ -28,6 +33,10 @@ export function EndCallToolConfig({
     onMessageTypeChange,
     customMessage,
     onCustomMessageChange,
+    endCallReason,
+    onEndCallReasonChange,
+    endCallReasonDescription,
+    onEndCallReasonDescriptionChange,
 }: EndCallToolConfigProps) {
     return (
         <Card>
@@ -63,6 +72,35 @@ export function EndCallToolConfig({
                     />
                 </div>
 
+                <div className="grid gap-2 pt-4 border-t">
+                    <div className="flex items-center space-x-2">
+                        <Switch
+                            id="end-call-reason"
+                            checked={endCallReason}
+                            onCheckedChange={onEndCallReasonChange}
+                        />
+                        <Label htmlFor="end-call-reason">Capture End Call Reason</Label>
+                    </div>
+                    <Label className="text-xs text-muted-foreground">
+                        When enabled, the AI will provide a reason for ending the call.
+                        The reason will be set as the call disposition and added to call tags for analytics.
+                    </Label>
+                    {endCallReason && (
+                        <div className="grid gap-2 pt-2">
+                            <Label>Reason Description</Label>
+                            <Label className="text-xs text-muted-foreground">
+                                Instructions shown to the AI for what kind of reason to provide
+                            </Label>
+                            <Textarea
+                                value={endCallReasonDescription}
+                                onChange={(e) => onEndCallReasonDescriptionChange(e.target.value)}
+                                placeholder="e.g., The reason for ending the call (e.g., 'voicemail_detected', 'issue_resolved', 'customer_requested')"
+                                rows={2}
+                            />
+                        </div>
+                    )}
+                </div>
+
                 <div className="grid gap-4 pt-4 border-t">
                     <Label>Goodbye Message</Label>
                     <Label className="text-xs text-muted-foreground">

ui/src/app/tools/[toolUuid]/page.tsx

@@ -9,6 +9,7 @@ import {
     updateToolApiV1ToolsToolUuidPut,
 } from "@/client/sdk.gen";
 import type { ToolResponse, TransferCallConfig as APITransferCallConfig } from "@/client/types.gen";
+import type { EndCallConfig } from "@/client/types.gen";
 import { type HttpMethod, type KeyValueItem, type ToolParameter, validateUrl } from "@/components/http";
 import { Button } from "@/components/ui/button";
 import {
@@ -22,7 +23,7 @@ import { Skeleton } from "@/components/ui/skeleton";
 import { useAuth } from "@/lib/auth";
 
 import {
-    type EndCallConfig,
+    DEFAULT_END_CALL_REASON_DESCRIPTION,
     type EndCallMessageType,
     getCategoryConfig,
     getToolTypeLabel,
@@ -68,6 +69,15 @@ export default function ToolDetailPage() {
     // End Call form state
     const [endCallMessageType, setEndCallMessageType] = useState<EndCallMessageType>("none");
     const [endCallCustomMessage, setEndCallCustomMessage] = useState("");
+    const [endCallReason, setEndCallReason] = useState(false);
+    const [endCallReasonDescription, setEndCallReasonDescription] = useState("");
+
+    const handleEndCallReasonChange = (enabled: boolean) => {
+        setEndCallReason(enabled);
+        if (enabled && !endCallReasonDescription) {
+            setEndCallReasonDescription(DEFAULT_END_CALL_REASON_DESCRIPTION);
+        }
+    };
 
     // Transfer Call form state
     const [transferDestination, setTransferDestination] = useState("");
@@ -119,9 +129,13 @@ export default function ToolDetailPage() {
             if (config) {
                 setEndCallMessageType(config.messageType || "none");
                 setEndCallCustomMessage(config.customMessage || "");
+                setEndCallReason(config.endCallReason ?? false);
+                setEndCallReasonDescription(config.endCallReasonDescription || "");
             } else {
                 setEndCallMessageType("none");
                 setEndCallCustomMessage("");
+                setEndCallReason(false);
+                setEndCallReasonDescription("");
             }
         } else if (tool.category === "transfer_call") {
             // Populate transfer call specific fields
@@ -225,6 +239,8 @@ export default function ToolDetailPage() {
                         config: {
                             messageType: endCallMessageType,
                             customMessage: endCallMessageType === "custom" ? endCallCustomMessage : undefined,
+                            endCallReason,
+                            endCallReasonDescription: endCallReason ? endCallReasonDescription || undefined : undefined,
                         },
                     },
                 };
@@ -432,6 +448,10 @@ const data = await response.json();`;
                             onMessageTypeChange={setEndCallMessageType}
                             customMessage={endCallCustomMessage}
                             onCustomMessageChange={setEndCallCustomMessage}
+                            endCallReason={endCallReason}
+                            onEndCallReasonChange={handleEndCallReasonChange}
+                            endCallReasonDescription={endCallReasonDescription}
+                            onEndCallReasonDescriptionChange={setEndCallReasonDescription}
                         />
                     ) : isTransferCallTool ? (
                         <TransferCallToolConfig

ui/src/app/tools/config.tsx

@@ -3,6 +3,8 @@
 import { Cog, Globe, type LucideIcon, PhoneForwarded, PhoneOff, Puzzle } from "lucide-react";
 import { type ReactNode } from "react";
 
+import type { EndCallConfig } from "@/client/types.gen";
+
 export type ToolCategory = "http_api" | "end_call" | "transfer_call" | "native" | "integration";
 
 export type EndCallMessageType = "none" | "custom";
@@ -110,15 +112,13 @@ export function getToolTypeLabel(category: string): string {
     }
 }
 
-// End Call tool specific configuration
-export interface EndCallConfig {
-    messageType: EndCallMessageType;
-    customMessage?: string;
-}
+export const DEFAULT_END_CALL_REASON_DESCRIPTION =
+    "The reason for ending the call (e.g., 'voicemail_detected', 'issue_resolved', 'customer_requested')";
 
 export const DEFAULT_END_CALL_CONFIG: EndCallConfig = {
     messageType: "none",
     customMessage: "",
+    endCallReason: false,
 };
 
 // Transfer Call tool specific configuration

ui/src/client/types.gen.ts

@@ -569,6 +569,14 @@ export type EndCallConfig = {
      * Custom message to play before ending the call
      */
     customMessage?: string | null;
+    /**
+     * When enabled, LLM must provide a reason for ending the call. The reason is set as call disposition and added to call tags.
+     */
+    endCallReason?: boolean;
+    /**
+     * Description shown to the LLM for the reason parameter. Used only when endCallReason is enabled.
+     */
+    endCallReasonDescription?: string | null;
 };
 
 /**