diff --git a/extensions/vscode-api-tests/src/singlefolder-tests/notebook.test.ts b/extensions/vscode-api-tests/src/singlefolder-tests/notebook.test.ts
index aea8f831393..5498a89d658 100644
--- a/extensions/vscode-api-tests/src/singlefolder-tests/notebook.test.ts
+++ b/extensions/vscode-api-tests/src/singlefolder-tests/notebook.test.ts
@@ -69,7 +69,7 @@ class Kernel {
 		await task.replaceOutput([new vscode.NotebookCellOutput([
 			vscode.NotebookCellOutputItem.text('my output', 'text/plain')
 		])]);
-		task.end({ success: true });
+		task.end(true);
 	}
 }
 
@@ -188,7 +188,7 @@ suite('Notebook API tests', function () {
 				await task.replaceOutput([new vscode.NotebookCellOutput([
 					vscode.NotebookCellOutputItem.text('my second output', 'text/plain')
 				])]);
-				task.end({ success: true });
+				task.end(true);
 			}
 		};
 
@@ -781,7 +781,7 @@ suite('Notebook API tests', function () {
 						await task.replaceOutput([new vscode.NotebookCellOutput([
 							vscode.NotebookCellOutputItem.text('Canceled', 'text/plain')
 						])]);
-						task.end({});
+						task.end(undefined);
 					});
 
 				}
@@ -826,7 +826,7 @@ suite('Notebook API tests', function () {
 				await this._task!.replaceOutput([new vscode.NotebookCellOutput([
 					vscode.NotebookCellOutputItem.text('Interrupted', 'text/plain')
 				])]);
-				this._task!.end({});
+				this._task!.end(undefined);
 			}
 		};
 
@@ -1188,7 +1188,7 @@ suite('Notebook API tests', function () {
 				])]);
 				assert.strictEqual(cell.notebook.cellAt(0).outputs.length, 1);
 				assert.deepStrictEqual(new TextDecoder().decode(cell.notebook.cellAt(0).outputs[0].items[0].data), 'Some output');
-				task.end({});
+				task.end(undefined);
 				called = true;
 			}
 		};
diff --git a/src/vs/vscode.d.ts b/src/vs/vscode.d.ts
index b67d00239f9..f56adfb89ed 100644
--- a/src/vs/vscode.d.ts
+++ b/src/vs/vscode.d.ts
@@ -11933,32 +11933,6 @@ declare module 'vscode' {
 		dispose(): void;
 	}
 
-	// todo@api jsdoc
-	// todo@api Inline unless we can come up with more (future) properties
-	export interface NotebookCellExecuteStartContext {
-		/**
-		 * The time that execution began, in milliseconds in the Unix epoch. Used to drive the clock
-		 * that shows for how long a cell has been running. If not given, the clock won't be shown.
-		 */
-		startTime?: number;
-	}
-
-	// todo@api jsdoc
-	// todo@api Inline unless we can come up with more (future) properties
-	export interface NotebookCellExecuteEndContext {
-		/**
-		 * If true, a green check is shown on the cell status bar.
-		 * If false, a red X is shown.
-		 * If undefined, no check or X icon is shown.
-		 */
-		success?: boolean;
-
-		/**
-		 * The time that execution finished, in milliseconds in the Unix epoch.
-		 */
-		endTime?: number;
-	}
-
 	/**
 	 * A NotebookCellExecution is how {@link NotebookController notebook controller} modify a notebook cell as
 	 * it is executing.
@@ -11988,13 +11962,23 @@ declare module 'vscode' {
 		 */
 		executionOrder: number | undefined;
 
-		// todo@API inline context object?
-		// @rob inline as arguments
-		start(context?: NotebookCellExecuteStartContext): void;
+		/**
+		 * Signal that the execution has begun.
+		 *
+		 * @param startTime The time that execution began, in milliseconds in the Unix epoch. Used to drive the clock
+		 * that shows for how long a cell has been running. If not given, the clock won't be shown.
+		 */
+		start(startTime?: number): void;
 
-		// todo@API inline context object?
-		// @rob inline as arguments
-		end(result?: NotebookCellExecuteEndContext): void;
+		/**
+		 * Signal that execution has ended.
+		 *
+		 * @param success If true, a green check is shown on the cell status bar.
+		 * If false, a red X is shown.
+		 * If undefined, no check or X icon is shown.
+		 * @param endTime The time that execution finished, in milliseconds in the Unix epoch.
+		 */
+		end(success: boolean | undefined, endTime?: number): void;
 
 		/**
 		 * Clears the output of the cell that is executing or of another cell that is affected by this execution.
diff --git a/src/vs/workbench/api/common/extHostNotebookKernels.ts b/src/vs/workbench/api/common/extHostNotebookKernels.ts
index dbee7a478b5..b9119baf1fe 100644
--- a/src/vs/workbench/api/common/extHostNotebookKernels.ts
+++ b/src/vs/workbench/api/common/extHostNotebookKernels.ts
@@ -447,7 +447,7 @@ class NotebookCellExecutionTask extends Disposable {
 				});
 			},
 
-			start(context?: vscode.NotebookCellExecuteStartContext): void {
+			start(startTime?: number): void {
 				if (that._state === NotebookCellExecutionTaskState.Resolved || that._state === NotebookCellExecutionTaskState.Started) {
 					throw new Error('Cannot call start again');
 				}
@@ -457,11 +457,11 @@ class NotebookCellExecutionTask extends Disposable {
 
 				that.mixinMetadata({
 					runState: NotebookCellExecutionState.Executing,
-					runStartTime: context?.startTime ?? null
+					runStartTime: startTime ?? null
 				});
 			},
 
-			end(result?: vscode.NotebookCellExecuteEndContext): void {
+			end(success: boolean | undefined, endTime?: number): void {
 				if (that._state === NotebookCellExecutionTaskState.Resolved) {
 					throw new Error('Cannot call resolve twice');
 				}
@@ -471,8 +471,8 @@ class NotebookCellExecutionTask extends Disposable {
 
 				that.mixinMetadata({
 					runState: null,
-					lastRunSuccess: result?.success ?? null,
-					runEndTime: result?.endTime ?? null,
+					lastRunSuccess: success ?? null,
+					runEndTime: endTime ?? null,
 				});
 			},