diff --git a/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative.Mcp/DefaultMcpToolHandler.cs b/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative.Mcp/DefaultMcpToolHandler.cs
index 13474d7be5..c133b38bbd 100644
--- a/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative.Mcp/DefaultMcpToolHandler.cs
+++ b/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative.Mcp/DefaultMcpToolHandler.cs
@@ -28,6 +28,8 @@ namespace Microsoft.Agents.AI.Workflows.Declarative.Mcp;
 /// </remarks>
 public sealed class DefaultMcpToolHandler : IMcpToolHandler, IAsyncDisposable
 {
+    private const string FilenameAdditionalPropertyName = "filename";
+
     /// <summary>
     /// Reserved <c>toolName</c> value that maps an <see cref="IMcpToolHandler.InvokeToolAsync"/> request
     /// to the MCP protocol <c>tools/list</c> discovery operation.
@@ -280,11 +282,41 @@ public sealed class DefaultMcpToolHandler : IMcpToolHandler, IAsyncDisposable
         // UriContent here so callers always receive a usable AIContent.
         return block.ToAIContent() ?? block switch
         {
-            ResourceLinkBlock link => new UriContent(link.Uri, link.MimeType ?? "application/octet-stream") { RawRepresentation = link },
-            _ => new TextContent(block.ToString() ?? string.Empty) { RawRepresentation = block },
+            ResourceLinkBlock link => new UriContent(link.Uri, link.MimeType ?? "application/octet-stream")
+            {
+                RawRepresentation = link,
+                AdditionalProperties = CreateAdditionalProperties(link),
+            },
+            _ => new TextContent(block.ToString() ?? string.Empty)
+            {
+                RawRepresentation = block,
+                AdditionalProperties = CreateAdditionalProperties(block),
+            },
         };
     }
 
+    private static AdditionalPropertiesDictionary? CreateAdditionalProperties(ContentBlock block)
+    {
+        AdditionalPropertiesDictionary? properties = null;
+
+        if (block.Meta is not null)
+        {
+            foreach (var property in block.Meta)
+            {
+                properties ??= new AdditionalPropertiesDictionary();
+                properties.Add(property.Key, property.Value);
+            }
+        }
+
+        if (block is ResourceLinkBlock { Name: { Length: > 0 } name })
+        {
+            properties ??= new AdditionalPropertiesDictionary();
+            properties.TryAdd(FilenameAdditionalPropertyName, name);
+        }
+
+        return properties;
+    }
+
     private static string SerializeToolsList(IEnumerable<Tool> tools)
     {
         using MemoryStream stream = new();
diff --git a/dotnet/tests/Microsoft.Agents.AI.Workflows.Declarative.Mcp.UnitTests/DefaultMcpToolHandlerTests.cs b/dotnet/tests/Microsoft.Agents.AI.Workflows.Declarative.Mcp.UnitTests/DefaultMcpToolHandlerTests.cs
index 2e6f9d9ea1..1327c3df48 100644
--- a/dotnet/tests/Microsoft.Agents.AI.Workflows.Declarative.Mcp.UnitTests/DefaultMcpToolHandlerTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.Workflows.Declarative.Mcp.UnitTests/DefaultMcpToolHandlerTests.cs
@@ -616,6 +616,53 @@ public sealed class DefaultMcpToolHandlerTests
         uriContent.MediaType.Should().Be("application/octet-stream");
     }
 
+    [Fact]
+    public void ConvertContentBlock_ResourceLinkBlock_WithMeta_ShouldPropagateToAdditionalProperties()
+    {
+        // Arrange
+        ResourceLinkBlock block = new()
+        {
+            Uri = "https://example.com/resource.bin",
+            Name = string.Empty,
+            MimeType = "application/zip",
+            Meta = new System.Text.Json.Nodes.JsonObject
+            {
+                ["traceId"] = "abc-123",
+                ["priority"] = 7,
+            },
+        };
+
+        // Act
+        AIContent result = DefaultMcpToolHandler.ConvertContentBlock(block);
+
+        // Assert
+        UriContent uriContent = result.Should().BeOfType<UriContent>().Subject;
+        uriContent.AdditionalProperties.Should().NotBeNull();
+        uriContent.AdditionalProperties!.Should().HaveCount(2);
+        uriContent.AdditionalProperties["traceId"].Should().BeSameAs(block.Meta!["traceId"]);
+        uriContent.AdditionalProperties["priority"].Should().BeSameAs(block.Meta["priority"]);
+    }
+
+    [Fact]
+    public void ConvertContentBlock_ResourceLinkBlock_WithName_ShouldMapNameToFilenameAdditionalProperty()
+    {
+        // Arrange
+        ResourceLinkBlock block = new()
+        {
+            Uri = "https://example.com/resource.bin",
+            Name = "resource.bin",
+            MimeType = "application/zip",
+        };
+
+        // Act
+        AIContent result = DefaultMcpToolHandler.ConvertContentBlock(block);
+
+        // Assert
+        UriContent uriContent = result.Should().BeOfType<UriContent>().Subject;
+        uriContent.AdditionalProperties.Should().NotBeNull();
+        uriContent.AdditionalProperties!["filename"].Should().Be("resource.bin");
+    }
+
     [Fact]
     public void ConvertContentBlock_ToolUseContentBlock_ShouldReturnFunctionCallContent()
     {