Add SchemaCreateOptions property to McpServerOptions

Co-authored-by: eiriktsarpalis <2813363+eiriktsarpalis@users.noreply.github.com>

Author: Copilot

src/ModelContextProtocol.Core/Server/McpServerOptions.cs

@@ -81,6 +81,21 @@ public sealed class McpServerOptions
     /// </remarks>
     public JsonSerializerOptions? JsonSerializerOptions { get; set; }
 
+    /// <summary>
+    /// Gets or sets the default JSON schema creation options to use for tools, prompts, and resources.
+    /// </summary>
+    /// <remarks>
+    /// <para>
+    /// This property provides server-wide default schema creation settings that will be used
+    /// by all tools, prompts, and resources unless they explicitly specify their own
+    /// <see cref="Microsoft.Extensions.AI.AIJsonSchemaCreateOptions"/> during registration.
+    /// </para>
+    /// <para>
+    /// If not set, defaults to <see cref="Microsoft.Extensions.AI.AIJsonSchemaCreateOptions.Default"/>.
+    /// </para>
+    /// </remarks>
+    public Microsoft.Extensions.AI.AIJsonSchemaCreateOptions? SchemaCreateOptions { get; set; }
+
     /// <summary>
     /// Gets or sets whether to create a new service provider scope for each handled request.
     /// </summary>