diff --git a/src/vs/platform/extensions/common/extensionsApiProposals.ts b/src/vs/platform/extensions/common/extensionsApiProposals.ts
index a33708b4972..80042f2c555 100644
--- a/src/vs/platform/extensions/common/extensionsApiProposals.ts
+++ b/src/vs/platform/extensions/common/extensionsApiProposals.ts
@@ -226,6 +226,9 @@ const _allApiProposals = {
 	languageModelSystem: {
 		proposal: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.languageModelSystem.d.ts',
 	},
+	languageModelToolsForAgent: {
+		proposal: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.languageModelToolsForAgent.d.ts',
+	},
 	languageStatusText: {
 		proposal: 'https://raw.githubusercontent.com/microsoft/vscode/main/src/vscode-dts/vscode.proposed.languageStatusText.d.ts',
 	},
diff --git a/src/vs/workbench/contrib/chat/common/tools/languageModelToolsContribution.ts b/src/vs/workbench/contrib/chat/common/tools/languageModelToolsContribution.ts
index e75fb61664a..d375686f553 100644
--- a/src/vs/workbench/contrib/chat/common/tools/languageModelToolsContribution.ts
+++ b/src/vs/workbench/contrib/chat/common/tools/languageModelToolsContribution.ts
@@ -135,6 +135,8 @@ function toToolKey(extensionIdentifier: ExtensionIdentifier, toolName: string) {
 	return `${extensionIdentifier.value}/${toolName}`;
 }
 
+const CopilotAgentModeTag = 'vscode_editing';
+
 export class LanguageModelToolsExtensionPointHandler implements IWorkbenchContribution {
 	static readonly ID = 'workbench.contrib.toolsExtensionPointHandler';
 
@@ -167,7 +169,14 @@ export class LanguageModelToolsExtensionPointHandler implements IWorkbenchContri
 						continue;
 					}
 
-					if (rawTool.tags?.some(tag => tag.startsWith('copilot_') || tag.startsWith('vscode_')) && !isProposedApiEnabled(extension.description, 'chatParticipantPrivate')) {
+					if (rawTool.tags?.includes(CopilotAgentModeTag)) {
+						if (!isProposedApiEnabled(extension.description, 'languageModelToolsForAgent') && !isProposedApiEnabled(extension.description, 'chatParticipantPrivate')) {
+							logService.error(`Extension '${extension.description.identifier.value}' CANNOT register tool with tag "${CopilotAgentModeTag}" without enabling 'languageModelToolsForAgent' proposal`);
+							continue;
+						}
+					}
+
+					if (rawTool.tags?.some(tag => tag !== CopilotAgentModeTag && (tag.startsWith('copilot_') || tag.startsWith('vscode_'))) && !isProposedApiEnabled(extension.description, 'chatParticipantPrivate')) {
 						logService.error(`Extension '${extension.description.identifier.value}' CANNOT register tool with tags starting with "vscode_" or "copilot_"`);
 						continue;
 					}
diff --git a/src/vscode-dts/vscode.proposed.languageModelToolsForAgent.d.ts b/src/vscode-dts/vscode.proposed.languageModelToolsForAgent.d.ts
new file mode 100644
index 00000000000..9190a1c18b8
--- /dev/null
+++ b/src/vscode-dts/vscode.proposed.languageModelToolsForAgent.d.ts
@@ -0,0 +1,8 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+declare module 'vscode' {
+	// Enables access to providing language model tools to agent mode
+}