fix(ui): show glob pattern in tool description

packages/ui/src/components/chat/message/parts/ToolPart.test.ts

@@ -4,6 +4,7 @@ import { readTaskTagSessionIdFromOutput } from './taskSessionIdParser';
 import { tryParseJsonOutput } from '../toolRenderers';
 import { getStreamingThrottleText } from '../../hooks/useStreamingTextThrottle';
 import { getStreamingOutputAppend, getToolOutput } from './toolOutput';
+import { getToolDescriptionFallback } from './toolRenderUtils';
 
 describe('getToolOutput', () => {
     test('prefers authoritative state output', () => {
@@ -64,3 +65,15 @@ describe('OpenChamber tool output', () => {
         expect(tryParseJsonOutput(JSON.stringify(result))).toEqual({ data: result, isJson: true });
     });
 });
+
+describe('getToolDescriptionFallback', () => {
+    test('uses the glob pattern when the provided description and title are empty', () => {
+        expect(getToolDescriptionFallback('glob', '', { pattern: 'packages/electron/README.md' }))
+            .toBe('packages/electron/README.md');
+    });
+
+    test('prefers an existing glob description over the pattern', () => {
+        expect(getToolDescriptionFallback('glob', 'Electron docs', { pattern: 'packages/electron/README.md' }))
+            .toBe('Electron docs');
+    });
+});

packages/ui/src/components/chat/message/parts/ToolPart.tsx

@@ -58,6 +58,7 @@ import { getDiffPatchEntries, getPatchText, type DiffPatchEntry } from './toolDi
 import { isEmbeddedSessionChat } from '@/components/layout/contextPanelEmbeddedChat';
 import { useStreamingTextThrottle } from '../../hooks/useStreamingTextThrottle';
 import { getStreamingOutputAppend, getToolOutput } from './toolOutput';
+import { getToolDescriptionFallback } from './toolRenderUtils';
 
 const TOOL_ROW_TEXT_CLASS = '!text-[length:var(--text-meta)] !leading-5 sm:!leading-6 tracking-normal';
 const TOOL_ROW_TITLE_CLASS = cn('typography-meta font-medium', TOOL_ROW_TEXT_CLASS);
@@ -791,7 +792,7 @@ const getToolDescription = (part: ToolPartType, state: ToolStateUnion, currentDi
     }
 
     const desc = input?.description || metadata?.description || ('title' in state && state.title) || '';
-    return typeof desc === 'string' ? desc : '';
+    return getToolDescriptionFallback(part.tool, desc, input);
 };
 
 interface ToolScrollableSectionProps {

packages/ui/src/components/chat/message/parts/toolRenderUtils.ts

@@ -29,3 +29,16 @@ export const isStandaloneTool = (toolName: unknown): boolean => {
 export const isStaticTool = (toolName: unknown): boolean => {
     return STATIC_TOOL_NAMES.has(normalizeToolName(toolName));
 };
+
+export const getToolDescriptionFallback = (
+    toolName: unknown,
+    description: unknown,
+    input: Record<string, unknown> | undefined,
+): string => {
+    if (typeof description === 'string' && description.trim().length > 0) {
+        return description;
+    }
+
+    const globPattern = normalizeToolName(toolName) === 'glob' ? input?.pattern : undefined;
+    return typeof globPattern === 'string' ? globPattern : '';
+};