fix: Parse tool description attributes

src/Cellm/Tools/FileReader/FileReaderRequest.cs

@@ -3,4 +3,5 @@
 
 namespace Cellm.Tools.FileReader;
 
+[Description("Reads the contents of file and returns plain text.")]
 internal record FileReaderRequest([Description("The absolute path to the file.")] string FilePath) : IRequest<FileReaderResponse>;

src/Cellm/Tools/Glob/GlobRequest.cs

@@ -3,7 +3,7 @@
 
 namespace Cellm.Tools.Glob;
 
-[Description("Search for files on the user's disk using glob patterns. Useful when user asks you to find files.")]
+[Description("Searches for files on the user's disk using glob patterns.")]
 internal record GlobRequest(
     [Description("The root directory to start the glob search from")] string RootPath,
     [Description("List of patterns to include in the search")] List<string> IncludePatterns,

src/Cellm/Tools/ToolFactory.cs

@@ -86,7 +86,7 @@ private static bool IsNullableType(Type type)
 
     private static string GetDescriptionForType(Type type)
     {
-        var descriptionAttribute = type.GetCustomAttribute<DescriptionAttribute>();
-        return descriptionAttribute?.Description ?? type.Name;
+        var descriptionAttribute = type.GetCustomAttribute<System.ComponentModel.DescriptionAttribute>();
+        return descriptionAttribute?.Description ?? throw new ArgumentException($"Cannot get tool description for {type.Name}.");
     }
 }