diff --git a/frontend/src/i18n/en.json b/frontend/src/i18n/en.json
index 115da4457..99b59f1d8 100644
--- a/frontend/src/i18n/en.json
+++ b/frontend/src/i18n/en.json
@@ -501,6 +501,9 @@
       "currentUsage": "Current Usage",
       "today": "Today",
       "month": "This Month",
+      "maxToolRounds": "Model Step Limit",
+      "maxToolRoundsLabel": "Maximum model steps per run",
+      "maxToolRoundsDesc": "Each model step that returns a result counts, including wait or error results. Tool-call count is separate. Default: 50",
       "saveSettings": "Save Settings",
       "save": "Save",
       "saving": "Saving...",
diff --git a/frontend/src/i18n/zh.json b/frontend/src/i18n/zh.json
index fb6e1c96f..91a61c464 100644
--- a/frontend/src/i18n/zh.json
+++ b/frontend/src/i18n/zh.json
@@ -508,9 +508,9 @@
       "currentUsage": "当前用量",
       "today": "今日",
       "month": "本月",
-      "maxToolRounds": "最大工具调用轮次",
-      "maxToolRoundsLabel": "每条消息的最大轮次",
-      "maxToolRoundsDesc": "智能体每条消息可执行的工具调用轮次数（搜索、写入等）。默认值：50",
+      "maxToolRounds": "模型决策步数上限",
+      "maxToolRoundsLabel": "单次任务的最大模型决策步数",
+      "maxToolRoundsDesc": "模型决策步骤返回结果时即计入，包括等待或错误结果；工具调用次数单独计算。默认值：50",
       "saveSettings": "保存设置",
       "save": "保存",
       "saving": "保存中...",
diff --git a/frontend/src/pages/agent-detail/tabs/SettingsTab.tsx b/frontend/src/pages/agent-detail/tabs/SettingsTab.tsx
index 6b4c6f327..d2d680b68 100644
--- a/frontend/src/pages/agent-detail/tabs/SettingsTab.tsx
+++ b/frontend/src/pages/agent-detail/tabs/SettingsTab.tsx
@@ -166,9 +166,9 @@ export default function SettingsTab(props: Props) {
             </div>
 
             <div className="card" style={{ marginBottom: '12px' }}>
-                <h4 style={{ marginBottom: '12px', display: 'flex', alignItems: 'center', gap: '6px' }}><IconTools size={16} stroke={1.8} /> {t('agent.settings.maxToolRounds', 'Max Tool Call Rounds')}</h4>
+                <h4 style={{ marginBottom: '12px', display: 'flex', alignItems: 'center', gap: '6px' }}><IconTools size={16} stroke={1.8} /> {t('agent.settings.maxToolRounds', 'Model Step Limit')}</h4>
                 <div>
-                    <label style={{ display: 'block', fontSize: '13px', fontWeight: 500, marginBottom: '6px' }}>{t('agent.settings.maxToolRoundsLabel', 'Maximum rounds per message')}</label>
+                    <label style={{ display: 'block', fontSize: '13px', fontWeight: 500, marginBottom: '6px' }}>{t('agent.settings.maxToolRoundsLabel', 'Maximum model steps per run')}</label>
                     <input
                         className="input"
                         type="number"
@@ -178,7 +178,7 @@ export default function SettingsTab(props: Props) {
                         onChange={(e) => setSettingsForm((form) => ({ ...form, max_tool_rounds: Math.max(5, Math.min(200, parseInt(e.target.value) || 50)) }))}
                         style={{ width: '120px' }}
                     />
-                    <div style={{ fontSize: '11px', color: 'var(--text-tertiary)', marginTop: '4px' }}>{t('agent.settings.maxToolRoundsDesc', 'How many tool-calling rounds the agent can perform per message (search, write, etc). Default: 50')}</div>
+                    <div style={{ fontSize: '11px', color: 'var(--text-tertiary)', marginTop: '4px' }}>{t('agent.settings.maxToolRoundsDesc', 'Each model step that returns a result counts, including wait or error results. Tool-call count is separate. Default: 50')}</div>
                 </div>
             </div>