diff --git a/apps/web/src/components/editor/panels/chat/index.tsx b/apps/web/src/components/editor/panels/chat/index.tsx
index 59ba9c91..c5f96a81 100644
--- a/apps/web/src/components/editor/panels/chat/index.tsx
+++ b/apps/web/src/components/editor/panels/chat/index.tsx
@@ -67,7 +67,7 @@ export function ChatPanel() {
 				<ScrollArea className="flex-1 p-3" ref={scrollRef}>
 					<div className="flex flex-col gap-2">
 						{messages.map((msg) => (
-							<MessageBubble key={msg.id} message={msg} />
+							<MessageBubble key={msg.id} message={msg} messages={messages} />
 						))}
 						{loading && (
 							<div className="flex items-center gap-2 px-3 py-2">
diff --git a/apps/web/src/components/editor/panels/chat/message-bubble.tsx b/apps/web/src/components/editor/panels/chat/message-bubble.tsx
index 5e5d965c..aed99f73 100644
--- a/apps/web/src/components/editor/panels/chat/message-bubble.tsx
+++ b/apps/web/src/components/editor/panels/chat/message-bubble.tsx
@@ -1,23 +1,30 @@
 "use client";
 
 import { cn } from "@/utils/ui";
-import type { ChatMessage } from "@/agent/types";
-import {
-	isTranscriptData,
-	formatTimestamp,
-} from "./transcript-utils";
+import type { ChatMessage, ToolCall } from "@/agent/types";
+import { isTranscriptData, formatTimestamp } from "./transcript-utils";
 import type { TranscriptData } from "./transcript-utils";
+import { ToolCallCard } from "./tool-call-card";
+import { ToolResultCard } from "./tool-result-card";
 
 interface MessageBubbleProps {
 	message: ChatMessage;
+	messages: ChatMessage[];
 }
 
-const ROLE_LABELS: Record<ChatMessage["role"], string> = {
-	user: "You",
-	assistant: "Assistant",
-	tool_result: "Tool",
-	system: "System",
-};
+function findToolCallName(
+	messages: ChatMessage[],
+	toolCallId?: string,
+): string | null {
+	if (!toolCallId) return null;
+	for (const msg of messages) {
+		if (msg.role === "assistant" && msg.toolCalls) {
+			const match = msg.toolCalls.find((tc: ToolCall) => tc.id === toolCallId);
+			if (match) return match.name;
+		}
+	}
+	return null;
+}
 
 function TranscriptCard({ data }: { data: TranscriptData }) {
 	return (
@@ -46,39 +53,62 @@ function TranscriptCard({ data }: { data: TranscriptData }) {
 	);
 }
 
-export function MessageBubble({ message }: MessageBubbleProps) {
+export function MessageBubble({ message, messages }: MessageBubbleProps) {
 	const isUser = message.role === "user";
 
-	// For tool_result messages, try to parse as transcript
 	if (message.role === "tool_result") {
+		const toolName = findToolCallName(messages, message.toolCallId);
+
 		try {
 			const parsed = JSON.parse(message.content);
 			if (isTranscriptData(parsed)) {
 				return (
-					<div className="flex flex-col gap-1 rounded-md px-3 py-2">
-						<span className="text-muted-foreground text-xs font-medium">
-							{ROLE_LABELS.tool_result}
-						</span>
+					<div className="px-3 py-0.5">
 						<TranscriptCard data={parsed} />
 					</div>
 				);
 			}
 		} catch {
-			// Not JSON — fall through to plain text
+			// not JSON
 		}
+
+		if (toolName) {
+			return (
+				<div className="px-3 py-0.5">
+					<ToolResultCard name={toolName} content={message.content} />
+				</div>
+			);
+		}
+
+		return (
+			<div className="px-3 py-0.5">
+				<ToolResultCard name="Tool" content={message.content} />
+			</div>
+		);
 	}
 
+	const hasToolCalls =
+		message.role === "assistant" &&
+		message.toolCalls &&
+		message.toolCalls.length > 0;
+
 	return (
 		<div
 			className={cn(
-				"flex flex-col gap-1 rounded-md px-3 py-2",
+				"flex flex-col gap-1.5 rounded-md px-3 py-2",
 				isUser ? "bg-secondary" : "bg-transparent",
 			)}
 		>
-			<span className="text-muted-foreground text-xs font-medium">
-				{ROLE_LABELS[message.role]}
-			</span>
-			<p className="text-sm whitespace-pre-wrap">{message.content}</p>
+			{message.content && (
+				<p className="text-sm whitespace-pre-wrap">{message.content}</p>
+			)}
+			{hasToolCalls && (
+				<div className="flex flex-col gap-1">
+					{message.toolCalls?.map((tc: ToolCall) => (
+						<ToolCallCard key={tc.id} toolCall={tc} />
+					))}
+				</div>
+			)}
 		</div>
 	);
 }
diff --git a/apps/web/src/components/editor/panels/chat/tool-call-card.tsx b/apps/web/src/components/editor/panels/chat/tool-call-card.tsx
new file mode 100644
index 00000000..6f634ca8
--- /dev/null
+++ b/apps/web/src/components/editor/panels/chat/tool-call-card.tsx
@@ -0,0 +1,52 @@
+"use client";
+
+import { useState } from "react";
+import { cn } from "@/utils/ui";
+import { formatToolCall } from "./tool-formatters";
+import type { ToolCall } from "@/agent/types";
+
+interface ToolCallCardProps {
+	toolCall: ToolCall;
+}
+
+export function ToolCallCard({ toolCall }: ToolCallCardProps) {
+	const [open, setOpen] = useState(false);
+	const summary = formatToolCall(toolCall.name, toolCall.args);
+
+	return (
+		<div className="group/tool flex flex-col rounded-md border border-border/50 bg-muted/30 text-xs">
+			<button
+				type="button"
+				onClick={() => setOpen(!open)}
+				className="flex items-center gap-2 px-2.5 py-1.5 text-left transition-colors hover:bg-muted/50"
+			>
+				<svg
+					xmlns="http://www.w3.org/2000/svg"
+					viewBox="0 0 16 16"
+					fill="currentColor"
+					role="img"
+					aria-label="Expand"
+					className={cn(
+						"size-3 shrink-0 text-muted-foreground transition-transform duration-200",
+						open && "rotate-90",
+					)}
+				>
+					<path
+						fillRule="evenodd"
+						d="M6.22 4.22a.75.75 0 0 1 1.06 0l3.25 3.25a.75.75 0 0 1 0 1.06l-3.25 3.25a.75.75 0 0 1-1.06-1.06L8.94 8 6.22 5.28a.75.75 0 0 1 0-1.06Z"
+						clipRule="evenodd"
+					/>
+				</svg>
+				<span className="font-medium text-foreground/80">{summary.label}</span>
+				<span className="text-muted-foreground">{summary.description}</span>
+			</button>
+			{open && (
+				<div className="border-border/50 border-t px-2.5 py-1.5">
+					<pre className="max-h-48 overflow-auto whitespace-pre-wrap break-all font-mono text-[11px] text-muted-foreground">
+						{JSON.stringify(toolCall.args, null, 2)}
+					</pre>
+				</div>
+			)}
+		</div>
+	);
+}
diff --git a/apps/web/src/components/editor/panels/chat/tool-formatters.ts b/apps/web/src/components/editor/panels/chat/tool-formatters.ts
new file mode 100644
index 00000000..6811cbfb
--- /dev/null
+++ b/apps/web/src/components/editor/panels/chat/tool-formatters.ts
@@ -0,0 +1,184 @@
+import { formatTimestamp } from "./transcript-utils";
+
+export interface ToolSummary {
+	label: string;
+	description: string;
+}
+
+export function formatToolCall(
+	name: string,
+	args: Record<string, unknown>,
+): ToolSummary {
+	const formatter = TOOL_CALL_FORMATTERS[name];
+	if (formatter) return formatter(args);
+
+	return {
+		label: formatToolName(name),
+		description: summarizeArgs(args),
+	};
+}
+
+export function formatToolResult(
+	name: string,
+	raw: string,
+): ToolSummary | null {
+	try {
+		const parsed = JSON.parse(raw);
+		if (parsed && typeof parsed === "object" && "error" in parsed) {
+			return {
+				label: formatToolName(name),
+				description: String(parsed.error),
+			};
+		}
+		const formatter = TOOL_RESULT_FORMATTERS[name];
+		if (formatter) return formatter(parsed);
+		return null;
+	} catch {
+		return null;
+	}
+}
+
+function formatToolName(name: string): string {
+	return name.replace(/_/g, " ").replace(/\b\w/g, (c) => c.toUpperCase());
+}
+
+function formatSeconds(s: unknown): string {
+	if (typeof s !== "number" || !Number.isFinite(s)) return "?";
+	return formatTimestamp(s);
+}
+
+function summarizeArgs(args: Record<string, unknown>): string {
+	const entries = Object.entries(args);
+	if (entries.length === 0) return "No arguments";
+	return entries
+		.map(([key, val]) => {
+			if (Array.isArray(val)) {
+				return `${key}: [${val.length} items]`;
+			}
+			if (typeof val === "object" && val !== null) {
+				return `${key}: {...}`;
+			}
+			return `${key}: ${String(val)}`;
+		})
+		.join(", ");
+}
+
+const TOOL_CALL_FORMATTERS: Record<
+	string,
+	(args: Record<string, unknown>) => ToolSummary
+> = {
+	split: (args) => {
+		const times = args.times as number[] | undefined;
+		if (!times || times.length === 0)
+			return { label: "Split", description: "No times specified" };
+		const formatted = times.map((t) => formatSeconds(t)).join(", ");
+		return {
+			label: "Split",
+			description: `at ${formatted}`,
+		};
+	},
+	load_context: (args) => {
+		const targetType = String(args.targetType ?? "unknown");
+		const id = args.id ?? args.assetId ?? args.elementId;
+		if (targetType === "asset") {
+			return {
+				label: "Load Asset",
+				description: id ? String(id) : "Loading asset...",
+			};
+		}
+		return {
+			label: "Load Context",
+			description: id ? `${targetType} ${String(id)}` : targetType,
+		};
+	},
+	list_timeline: () => ({
+		label: "List Timeline",
+		description: "Fetching timeline tracks",
+	}),
+	list_project_assets: (args) => {
+		const type = args.type ?? "all";
+		const filter = args.filter ?? "all";
+		const parts: string[] = [];
+		if (type !== "all") parts.push(String(type));
+		if (filter !== "all") parts.push(String(filter));
+		return {
+			label: "List Assets",
+			description:
+				parts.length > 0 ? parts.join(", ") : "Fetching project assets",
+		};
+	},
+	transcribe_video: (args) => {
+		const lang = args.language ? String(args.language) : null;
+		return {
+			label: "Transcribe",
+			description: lang ? `language: ${lang}` : "Transcribing audio",
+		};
+	},
+};
+
+const TOOL_RESULT_FORMATTERS: Record<
+	string,
+	(parsed: unknown) => ToolSummary | null
+> = {
+	split: (parsed) => {
+		const data = parsed as {
+			success?: boolean;
+			affectedElements?: string[];
+		} | null;
+		if (!data) return null;
+		const count = data.affectedElements?.length ?? 0;
+		return {
+			label: "Split",
+			description: data.success
+				? `${count} element${count !== 1 ? "s" : ""} affected`
+				: "Failed",
+		};
+	},
+	load_context: (parsed) => {
+		const data = parsed as {
+			status?: string;
+			cached?: boolean;
+			context?: { kind?: string; assetName?: string };
+		} | null;
+		if (!data) return null;
+		const assetName = data.context?.assetName;
+		const cached = data.cached ? " (cached)" : "";
+		return {
+			label: "Load Context",
+			description: assetName
+				? `${assetName}${cached}`
+				: `${data.status ?? "loaded"}${cached}`,
+		};
+	},
+	list_timeline: (parsed) => {
+		const data = parsed as { tracks?: unknown[] } | null;
+		if (!data) return null;
+		const count = data.tracks?.length ?? 0;
+		return {
+			label: "Timeline",
+			description: `${count} track${count !== 1 ? "s" : ""}`,
+		};
+	},
+	list_project_assets: (parsed) => {
+		const data = parsed as { assets?: unknown[] } | null;
+		if (!data) return null;
+		const count = data.assets?.length ?? 0;
+		return {
+			label: "Assets",
+			description: `${count} asset${count !== 1 ? "s" : ""}`,
+		};
+	},
+	transcribe_video: (parsed) => {
+		const data = parsed as {
+			assetName?: string;
+			language?: string;
+			segmentCount?: number;
+			duration?: number;
+		} | null;
+		if (!data) return null;
+		return {
+			label: "Transcript",
+			description: `${data.assetName ?? "audio"} · ${data.segmentCount ?? 0} segments`,
+		};
+	},
+};
diff --git a/apps/web/src/components/editor/panels/chat/tool-result-card.tsx b/apps/web/src/components/editor/panels/chat/tool-result-card.tsx
new file mode 100644
index 00000000..3f2e9063
--- /dev/null
+++ b/apps/web/src/components/editor/panels/chat/tool-result-card.tsx
@@ -0,0 +1,54 @@
+"use client";
+
+import { useState } from "react";
+import { cn } from "@/utils/ui";
+import { formatToolResult } from "./tool-formatters";
+
+interface ToolResultCardProps {
+	name: string;
+	content: string;
+}
+
+export function ToolResultCard({ name, content }: ToolResultCardProps) {
+	const [open, setOpen] = useState(false);
+	const summary = formatToolResult(name, content);
+
+	if (!summary) return null;
+
+	return (
+		<div className="group/result flex flex-col rounded-md border border-border/50 bg-muted/20 text-xs">
+			<button
+				type="button"
+				onClick={() => setOpen(!open)}
+				className="flex items-center gap-2 px-2.5 py-1.5 text-left transition-colors hover:bg-muted/40"
+			>
+				<svg
+					xmlns="http://www.w3.org/2000/svg"
+					viewBox="0 0 16 16"
+					fill="currentColor"
+					role="img"
+					aria-label="Expand"
+					className={cn(
+						"size-3 shrink-0 text-muted-foreground transition-transform duration-200",
+						open && "rotate-90",
+					)}
+				>
+					<path
+						fillRule="evenodd"
+						d="M6.22 4.22a.75.75 0 0 1 1.06 0l3.25 3.25a.75.75 0 0 1 0 1.06l-3.25 3.25a.75.75 0 0 1-1.06-1.06L8.94 8 6.22 5.28a.75.75 0 0 1 0-1.06Z"
+						clipRule="evenodd"
+					/>
+				</svg>
+				<span className="font-medium text-foreground/80">{summary.label}</span>
+				<span className="text-muted-foreground">{summary.description}</span>
+			</button>
+			{open && (
+				<div className="border-border/50 border-t px-2.5 py-1.5">
+					<pre className="max-h-48 overflow-auto whitespace-pre-wrap break-all font-mono text-[11px] text-muted-foreground">
+						{content}
+					</pre>
+				</div>
+			)}
+		</div>
+	);
+}