diff --git a/src/vs/workbench/api/common/extHost.api.impl.ts b/src/vs/workbench/api/common/extHost.api.impl.ts
index 522a47cfc8f..4376ba3408b 100644
--- a/src/vs/workbench/api/common/extHost.api.impl.ts
+++ b/src/vs/workbench/api/common/extHost.api.impl.ts
@@ -1447,7 +1447,7 @@ export function createApiFactoryAndRegisterActors(accessor: ServicesAccessor): I
 			}
 		};
 
-		// namespace: chat
+		// namespace: chatregisterMcpServerDefinitionProvider
 		const chat: typeof vscode.chat = {
 			registerMappedEditsProvider(_selector: vscode.DocumentSelector, _provider: vscode.MappedEditsProvider) {
 				checkProposedApiEnabled(extension, 'mappedEditsProvider');
@@ -1527,12 +1527,15 @@ export function createApiFactoryAndRegisterActors(accessor: ServicesAccessor): I
 			registerIgnoredFileProvider(provider: vscode.LanguageModelIgnoredFileProvider) {
 				return extHostLanguageModels.registerIgnoredFileProvider(extension, provider);
 			},
-			registerMcpConfigurationProvider(id, provider) {
+			registerMcpServerDefinitionProvider(id, provider) {
 				checkProposedApiEnabled(extension, 'mcpConfigurationProvider');
 				return extHostMcp.registerMcpConfigurationProvider(extension, id, provider);
 			}
 		};
 
+		// todo@connor4312: proposed API back-compat
+		(lm as any).registerMcpConfigurationProvider = lm.registerMcpServerDefinitionProvider;
+
 		// namespace: speech
 		const speech: typeof vscode.speech = {
 			registerSpeechProvider(id: string, provider: vscode.SpeechProvider) {
diff --git a/src/vs/workbench/api/common/extHostMcp.ts b/src/vs/workbench/api/common/extHostMcp.ts
index 39683cb2034..0a4c7429972 100644
--- a/src/vs/workbench/api/common/extHostMcp.ts
+++ b/src/vs/workbench/api/common/extHostMcp.ts
@@ -20,7 +20,7 @@ import * as Convert from './extHostTypeConverters.js';
 export const IExtHostMpcService = createDecorator<IExtHostMpcService>('IExtHostMpcService');
 
 export interface IExtHostMpcService extends ExtHostMcpShape {
-	registerMcpConfigurationProvider(extension: IExtensionDescription, id: string, provider: vscode.McpConfigurationProvider): IDisposable;
+	registerMcpConfigurationProvider(extension: IExtensionDescription, id: string, provider: vscode.McpServerDefinitionProvider): IDisposable;
 }
 
 export class ExtHostMcpService extends Disposable implements IExtHostMpcService {
@@ -28,7 +28,7 @@ export class ExtHostMcpService extends Disposable implements IExtHostMpcService
 	private readonly _initialProviderPromises = new Set<Promise<void>>();
 	private readonly _sseEventSources = this._register(new DisposableMap<number, McpHTTPHandle>());
 	private readonly _unresolvedMcpServers = new Map</* collectionId */ string, {
-		provider: vscode.McpConfigurationProvider;
+		provider: vscode.McpServerDefinitionProvider;
 		servers: vscode.McpServerDefinition[];
 	}>();
 
@@ -85,8 +85,8 @@ export class ExtHostMcpService extends Disposable implements IExtHostMpcService
 		return resolved ? Convert.McpServerDefinition.from(resolved) : undefined;
 	}
 
-	/** {@link vscode.lm.registerMcpConfigurationProvider} */
-	public registerMcpConfigurationProvider(extension: IExtensionDescription, id: string, provider: vscode.McpConfigurationProvider): IDisposable {
+	/** {@link vscode.lm.registerMcpServerDefinitionProvider} */
+	public registerMcpConfigurationProvider(extension: IExtensionDescription, id: string, provider: vscode.McpServerDefinitionProvider): IDisposable {
 		const store = new DisposableStore();
 
 		const metadata = extension.contributes?.modelContextServerCollections?.find(m => m.id === id);
@@ -125,8 +125,12 @@ export class ExtHostMcpService extends Disposable implements IExtHostMpcService
 			this._proxy.$deleteMcpCollection(mcp.id);
 		}));
 
-		if (provider.onDidChange) {
-			store.add(provider.onDidChange(update));
+		if (provider.onDidChangeServerDefinitions) {
+			store.add(provider.onDidChangeServerDefinitions(update));
+		}
+		// todo@connor4312: proposed API back-compat
+		if ((provider as any).onDidChange) {
+			store.add((provider as any).onDidChange(update));
 		}
 
 		const promise = new Promise<void>(resolve => {
diff --git a/src/vscode-dts/vscode.proposed.mcpConfigurationProvider.d.ts b/src/vscode-dts/vscode.proposed.mcpConfigurationProvider.d.ts
index 7e7e50e4d25..9f36dd5aca1 100644
--- a/src/vscode-dts/vscode.proposed.mcpConfigurationProvider.d.ts
+++ b/src/vscode-dts/vscode.proposed.mcpConfigurationProvider.d.ts
@@ -8,13 +8,15 @@ declare module 'vscode' {
 
 	/**
 	 * McpStdioServerDefinition represents an MCP server available by running
-	 * a local process and listening to its stdin and stdout streams.
+	 * a local process and listening to its stdin and stdout streams. The process
+	 * will be spawned as a child process of the extension host and by default
+	 * will not run in a shell environment.
 	 */
 	export class McpStdioServerDefinition {
 		/**
 		 * The human-readable name of the server.
 		 */
-		label: string;
+		readonly label: string;
 
 		/**
 		 * The working directory used to start the server.
@@ -62,7 +64,7 @@ declare module 'vscode' {
 		/**
 		 * The human-readable name of the server.
 		 */
-		label: string;
+		readonly label: string;
 
 		/**
 		 * The URI of the server. The editor will make a POST request to this URI
@@ -99,11 +101,11 @@ declare module 'vscode' {
 	 * To allow the editor to cache available servers, extensions should register
 	 * this before `activate()` resolves.
 	 */
-	export interface McpConfigurationProvider<T extends McpServerDefinition = McpServerDefinition> {
+	export interface McpServerDefinitionProvider<T extends McpServerDefinition = McpServerDefinition> {
 		/**
 		 * Optional event fired to signal that the set of available servers has changed.
 		 */
-		onDidChange?: Event<void>;
+		onDidChangeServerDefinitions?: Event<void>;
 
 		/**
 		 * Provides available MCP servers. The editor will call this method eagerly
@@ -132,6 +134,6 @@ declare module 'vscode' {
 	}
 
 	namespace lm {
-		export function registerMcpConfigurationProvider(id: string, provider: McpConfigurationProvider): Disposable;
+		export function registerMcpServerDefinitionProvider(id: string, provider: McpServerDefinitionProvider): Disposable;
 	}
 }