diff --git a/src/components/segments/ToolCallRequestView.tsx b/src/components/segments/ToolCallRequestView.tsx
index 099ff52..0f4fe46 100644
--- a/src/components/segments/ToolCallRequestView.tsx
+++ b/src/components/segments/ToolCallRequestView.tsx
@@ -1,23 +1,99 @@
 import type { ToolCallRequestSegment } from '../../types/protocol'
-import { Play } from 'lucide-react'
+import { Play, ChevronDown, ChevronRight } from 'lucide-react'
+import { useState } from 'react'
+
+/** Format a value for inline display — booleans, numbers, short strings stay inline; long strings/objects get special treatment */
+function formatArg(value: unknown): { display: string; isLong: boolean } {
+  if (value === null || value === undefined) {
+    return { display: String(value), isLong: false }
+  }
+  if (typeof value === 'boolean') {
+    return { display: value ? 'true' : 'false', isLong: false }
+  }
+  if (typeof value === 'number') {
+    return { display: String(value), isLong: false }
+  }
+  if (typeof value === 'string') {
+    const trimmed = value.trim()
+    const hasNewlines = trimmed.includes('\n')
+    const isLong = trimmed.length > 80 || hasNewlines
+    if (hasNewlines || trimmed.length > 200) {
+      return { display: trimmed.slice(0, 200) + (trimmed.length > 200 ? '…' : ''), isLong: true }
+    }
+    return { display: trimmed, isLong }
+  }
+  if (Array.isArray(value)) {
+    const s = JSON.stringify(value)
+    return { display: s, isLong: s.length > 80 }
+  }
+  if (typeof value === 'object') {
+    const s = JSON.stringify(value, null, 2)
+    return { display: s, isLong: s.length > 80 || s.includes('\n') }
+  }
+  return { display: String(value), isLong: false }
+}
+
+function ArgRow({ name, value }: { name: string; value: unknown }) {
+  const [expanded, setExpanded] = useState(false)
+  const { display, isLong } = formatArg(value)
+  const needsExpansion = isLong
+
+  return (
+    <div className="flex items-start gap-3 px-3 py-1.5 hover:bg-gray-800/40 group">
+      <span className="text-xs font-mono text-yellow-400 shrink-0 min-w-[80px] pt-px">
+        {name}
+      </span>
+      {needsExpansion ? (
+        <button
+          onClick={() => setExpanded(!expanded)}
+          className="flex-1 flex items-start gap-1.5 text-left min-w-0"
+        >
+          {expanded ? (
+            <ChevronDown size={12} className="text-gray-500 shrink-0 mt-0.5" />
+          ) : (
+            <ChevronRight size={12} className="text-gray-500 shrink-0 mt-0.5" />
+          )}
+          <span className="text-xs font-mono text-gray-400 break-all">
+            {expanded ? display : display.slice(0, 80).replace(/\n/g, ' ') + '…'}
+          </span>
+        </button>
+      ) : (
+        <span className="text-xs font-mono text-blue-300 break-all flex-1">{display}</span>
+      )}
+    </div>
+  )
+}
 
 export default function ToolCallRequestView({
   segment,
 }: {
   segment: ToolCallRequestSegment
 }) {
+  const entries = Object.entries(segment.arguments)
+
   return (
-    <div className="my-2 rounded-lg bg-gray-900 text-gray-100 overflow-hidden border border-gray-700">
-      <div className="flex items-center gap-2 px-3 py-1.5 bg-gray-800">
+    <div className="my-2 rounded-lg bg-gray-900 text-gray-100 overflow-hidden border border-gray-700 shadow-sm">
+      {/* Header */}
+      <div className="flex items-center gap-2 px-3 py-1.5 bg-gray-800 border-b border-gray-700">
         <Play size={14} className="text-green-400" />
         <span className="text-xs font-mono font-semibold text-green-400">
           {segment.toolName}
         </span>
-        <span className="text-xs text-gray-500">request</span>
+        <span className="text-[10px] text-gray-500 bg-gray-700/50 px-1.5 py-0.5 rounded">
+          request
+        </span>
       </div>
-      <pre className="px-3 py-2 text-xs font-mono text-gray-300 overflow-x-auto">
-        {JSON.stringify(segment.arguments, null, 2)}
-      </pre>
+
+      {/* Arguments as labeled rows */}
+      {entries.length > 0 ? (
+        <div className="py-1">
+          {entries.map(([key, value]) => (
+            <ArgRow key={key} name={key} value={value} />
+          ))}
+        </div>
+      ) : (
+        <div className="px-3 py-2 text-xs text-gray-600 italic">(no arguments)</div>
+      )}
     </div>
   )
 }