feat(core): refine shell tool description display logic (#24903)

packages/core/src/tools/shell.ts

@@ -63,6 +63,7 @@ export const OUTPUT_UPDATE_INTERVAL_MS = 1000;
 
 // Delay so user does not see the output of the process before the process is moved to the background.
 const BACKGROUND_DELAY_MS = 200;
+const SHOW_NL_DESCRIPTION_THRESHOLD = 150;
 
 export interface ShellToolParams {
   command: string;
@@ -136,9 +137,12 @@ export class ShellToolInvocation extends BaseToolInvocation<
   }
 
   getDescription(): string {
-    return this.params.description?.trim()
-      ? this.params.description
-      : this.params.command;
+    const descStr = this.params.description?.trim();
+    const commandStr = this.params.command;
+    return Array.from(commandStr).length <= SHOW_NL_DESCRIPTION_THRESHOLD ||
+      !descStr
+      ? commandStr
+      : descStr;
   }
 
   private simplifyPaths(paths: Set<string>): string[] {