feat(server): accept Standard Schemas in inputRequired.elicit (#2369)

Co-authored-by: Felix Weinberger <3823880+felixweinberger@users.noreply.github.com>

examples/guides/servers/input-required.examples.ts

@@ -36,6 +36,10 @@ const server = new McpServer({ name: 'releases', version: '1.0.0' }, { requestSt
 
 // "Return `input_required` instead of pushing a request"
 //#region registerTool_inputRequired
+const confirmationSchema = z.object({
+    confirm: z.boolean().meta({ title: 'Confirm deployment' })
+});
+
 server.registerTool(
     'deploy',
     {
@@ -43,13 +47,13 @@ server.registerTool(
         inputSchema: z.object({ env: z.string() })
     },
     async ({ env }, ctx): Promise<CallToolResult | InputRequiredResult> => {
-        const confirmed = acceptedContent<{ confirm: boolean }>(ctx.mcpReq.inputResponses, 'confirm');
+        const confirmed = acceptedContent(ctx.mcpReq.inputResponses, 'confirm', confirmationSchema);
         if (confirmed?.confirm !== true) {
             return inputRequired({
                 inputRequests: {
                     confirm: inputRequired.elicit({
                         message: `Deploy to ${env}?`,
-                        requestedSchema: { type: 'object', properties: { confirm: { type: 'boolean' } }, required: ['confirm'] }
+                        requestedSchema: confirmationSchema
                     })
                 }
             });