diff --git a/src/Core.Application/Abstractions/IAuthorResponse.cs b/src/Core.Application/Abstractions/IAuthorResponse.cs
new file mode 100644
index 0000000..bd353cb
--- /dev/null
+++ b/src/Core.Application/Abstractions/IAuthorResponse.cs
@@ -0,0 +1,9 @@
+namespace Goodtocode.SemanticKernel.Core.Application.Abstractions;
+
+public interface IAuthorResponse
+{
+    Guid AuthorId { get; }
+    string? Name { get; }
+    string Status { get; }
+    string? Message { get; }
+}
\ No newline at end of file
diff --git a/src/Core.Application/Abstractions/IAuthorsPlugin.cs b/src/Core.Application/Abstractions/IAuthorsPlugin.cs
index 6046c47..6fe7851 100644
--- a/src/Core.Application/Abstractions/IAuthorsPlugin.cs
+++ b/src/Core.Application/Abstractions/IAuthorsPlugin.cs
@@ -1,6 +1,6 @@
-namespace Goodtocode.SemanticKernel.Infrastructure.SemanticKernel.Plugins;
+namespace Goodtocode.SemanticKernel.Core.Application.Abstractions;
 
 public interface IAuthorsPlugin
 {
-    Task<string> GetAuthorInfoAsync(string authorId, CancellationToken cancellationToken);
+    Task<IAuthorResponse> GetAuthorNameAsync(Guid authorId, CancellationToken cancellationToken);
 }
\ No newline at end of file
diff --git a/src/Core.Application/Abstractions/IChatMessagesPlugin.cs b/src/Core.Application/Abstractions/IChatMessagesPlugin.cs
index b8ba38e..e243467 100644
--- a/src/Core.Application/Abstractions/IChatMessagesPlugin.cs
+++ b/src/Core.Application/Abstractions/IChatMessagesPlugin.cs
@@ -1,7 +1,7 @@
-namespace Goodtocode.SemanticKernel.Infrastructure.SemanticKernel.Plugins;
+namespace Goodtocode.SemanticKernel.Core.Application.Abstractions;
 
 public interface IChatMessagesPlugin
 {
     Task<IEnumerable<string>> ListRecentMessagesAsync(DateTime? startDate, DateTime? endDate, CancellationToken cancellationToken);
-    Task<IEnumerable<string>> GetChatMessagesAsync(string sessionId, CancellationToken cancellationToken);
+    Task<IEnumerable<string>> GetChatMessagesAsync(Guid sessionId, CancellationToken cancellationToken);
 }
diff --git a/src/Core.Application/Abstractions/IChatSessionsPlugin.cs b/src/Core.Application/Abstractions/IChatSessionsPlugin.cs
index 9418b31..76a9dd3 100644
--- a/src/Core.Application/Abstractions/IChatSessionsPlugin.cs
+++ b/src/Core.Application/Abstractions/IChatSessionsPlugin.cs
@@ -1,7 +1,7 @@
-namespace Goodtocode.SemanticKernel.Infrastructure.SemanticKernel.Plugins;
+namespace Goodtocode.SemanticKernel.Core.Application.Abstractions;
 
 public interface IChatSessionsPlugin
 {
     Task<IEnumerable<string>> ListRecentSessionsAsync(DateTime? startDate, DateTime? endDate, CancellationToken cancellationToken);
-    Task<string> UpdateChatSessionTitleAsync(string sessionId, string newTitle, CancellationToken cancellationToken);
+    Task<string> UpdateChatSessionTitleAsync(Guid sessionId, string newTitle, CancellationToken cancellationToken);
 }
\ No newline at end of file
diff --git a/src/Infrastructure.SemanticKernel/ConfigureServices.cs b/src/Infrastructure.SemanticKernel/ConfigureServices.cs
index 49a71fd..16c770d 100644
--- a/src/Infrastructure.SemanticKernel/ConfigureServices.cs
+++ b/src/Infrastructure.SemanticKernel/ConfigureServices.cs
@@ -1,4 +1,5 @@
-using Goodtocode.SemanticKernel.Infrastructure.SemanticKernel.Options;
+using Goodtocode.SemanticKernel.Core.Application.Abstractions;
+using Goodtocode.SemanticKernel.Infrastructure.SemanticKernel.Options;
 using Goodtocode.SemanticKernel.Infrastructure.SemanticKernel.Plugins;
 using Goodtocode.SemanticKernel.Infrastructure.SemanticKernel.Services;
 using Microsoft.Extensions.Configuration;
diff --git a/src/Infrastructure.SemanticKernel/Plugins/AuthorsPlugin.cs b/src/Infrastructure.SemanticKernel/Plugins/AuthorsPlugin.cs
index 1c14370..cd994e6 100644
--- a/src/Infrastructure.SemanticKernel/Plugins/AuthorsPlugin.cs
+++ b/src/Infrastructure.SemanticKernel/Plugins/AuthorsPlugin.cs
@@ -5,17 +5,45 @@
 
 namespace Goodtocode.SemanticKernel.Infrastructure.SemanticKernel.Plugins;
 
+public class AuthorResponse : IAuthorResponse
+{
+    public Guid AuthorId { get; set; }
+    public string? Name { get; set; }
+    public string? Status { get; set; }
+    public string? Message { get; set; }
+}
+
 public sealed class AuthorsPlugin(IServiceProvider serviceProvider) : IAuthorsPlugin
 {
     private readonly IServiceProvider _serviceProvider = serviceProvider;
 
     [KernelFunction("get_author")]
-    [Description("Returns the author's name for the specified author ID, or 'Author not found' if no match exists.")]
-    public async Task<string> GetAuthorInfoAsync(string authorId, CancellationToken cancellationToken)
+    [Description("Returns structured author info including name, status, and explanation.")]
+    async Task<IAuthorResponse> IAuthorsPlugin.GetAuthorNameAsync(Guid authorId, CancellationToken cancellationToken)
     {
         using var scope = _serviceProvider.CreateScope();
         var context = scope.ServiceProvider.GetRequiredService<ISemanticKernelContext>();
         var author = await context.Authors.FindAsync([authorId, cancellationToken], cancellationToken: cancellationToken);
-        return author?.Name ?? "Author not found";
+
+        if (author == null)
+        {
+            return new AuthorResponse
+            {
+                AuthorId = authorId,
+                Name = null,
+                Status = "NotFound",
+                Message = "No author found with the specified ID."
+            };
+        }
+
+        return new AuthorResponse
+        {
+            AuthorId = authorId,
+            Name = author.Name,
+            Status = string.IsNullOrWhiteSpace(author.Name) ? "Partial" : "Found",
+            Message = string.IsNullOrWhiteSpace(author.Name)
+                ? "Author exists but name is not yet linked to Entra External ID."
+                : "Author found."
+        };
     }
 }
diff --git a/src/Infrastructure.SemanticKernel/Plugins/ChatMessagesPlugin.cs b/src/Infrastructure.SemanticKernel/Plugins/ChatMessagesPlugin.cs
index 99093be..83a2e02 100644
--- a/src/Infrastructure.SemanticKernel/Plugins/ChatMessagesPlugin.cs
+++ b/src/Infrastructure.SemanticKernel/Plugins/ChatMessagesPlugin.cs
@@ -35,7 +35,7 @@ public async Task<IEnumerable<string>> ListRecentMessagesAsync(DateTime? startDa
 
     [KernelFunction("get_messages")]
     [Description("Retrieves all messages from a specific chat session.")]
-    public async Task<IEnumerable<string>> GetChatMessagesAsync(string sessionId,
+    public async Task<IEnumerable<string>> GetChatMessagesAsync(Guid sessionId,
         CancellationToken cancellationToken = default)
     {
         // Get ISemanticKernelContext directly instead of constructor DI to allow this plugin to be registered via AddSingleton() and not scoped due to EF.
@@ -43,7 +43,7 @@ public async Task<IEnumerable<string>> GetChatMessagesAsync(string sessionId,
         var context = scope.ServiceProvider.GetRequiredService<ISemanticKernelContext>();
 
         var messages = await context.ChatMessages
-        .Where(x => x.ChatSessionId.ToString() == sessionId)
+        .Where(x => x.ChatSessionId == sessionId)
             .ToListAsync(cancellationToken);
 
         return messages.Select(m => $"{m.ChatSessionId}: {m.Timestamp} - {m.Role}: {m.Content}");
diff --git a/src/Infrastructure.SemanticKernel/Plugins/ChatSessionsPlugin.cs b/src/Infrastructure.SemanticKernel/Plugins/ChatSessionsPlugin.cs
index 422abb6..17ea76e 100644
--- a/src/Infrastructure.SemanticKernel/Plugins/ChatSessionsPlugin.cs
+++ b/src/Infrastructure.SemanticKernel/Plugins/ChatSessionsPlugin.cs
@@ -37,7 +37,7 @@ public async Task<IEnumerable<string>> ListRecentSessionsAsync(
 
     [KernelFunction("change_title")]
     [Description("Changes the title on this chat session.")]
-    public async Task<string> UpdateChatSessionTitleAsync(string sessionId, string newTitle,
+    public async Task<string> UpdateChatSessionTitleAsync(Guid sessionId, string newTitle,
         CancellationToken cancellationToken = default)
     {
         // Get ISemanticKernelContext directly instead of constructor DI to allow this plugin to be registered via AddSingleton() and not scoped due to EF.
@@ -45,7 +45,7 @@ public async Task<string> UpdateChatSessionTitleAsync(string sessionId, string n
         var context = scope.ServiceProvider.GetRequiredService<ISemanticKernelContext>();
 
         var chatSession = await context.ChatSessions
-            .FirstOrDefaultAsync(x => x.Id.ToString() == sessionId, cancellationToken: cancellationToken);
+            .FirstOrDefaultAsync(x => x.Id == sessionId, cancellationToken: cancellationToken);
         chatSession!.Title = newTitle;
         context.ChatSessions.Update(chatSession);
         await context.SaveChangesAsync(cancellationToken);