PR is completed and approved, but cannot be merged because it is in draft state (#7468)

Fixes #7315

Author: alexr00

src/lm/tools/activePullRequestTool.ts

@@ -148,7 +148,7 @@ export class ActivePullRequestTool implements vscode.LanguageModelTool<FetchIssu
 				currentApprovals: status[1]?.approvals.length ?? 0,
 				areChangesRequested: (status[1]?.requestedChanges.length ?? 0) > 0,
 			},
-			isDraft: pullRequest.isDraft,
+			isDraft: pullRequest.isDraft ? 'is a draft and cannot be merged until marked as ready for review' : 'false',
 			codingAgentSession,
 			changes: (await pullRequest.getFileChangesInfo()).map(change => {
 				if (change instanceof InMemFileChange) {