diff --git a/blues-expert/.dockerignore b/blues-expert/.dockerignore
index 03a7a59..7271099 100644
--- a/blues-expert/.dockerignore
+++ b/blues-expert/.dockerignore
@@ -3,7 +3,6 @@
 .gitignore
 
 # Documentation
-*.md
 README*
 
 # Test files
@@ -35,4 +34,4 @@ main
 
 # Build artifacts
 /build/
-/dist/ 
+/dist/
diff --git a/blues-expert/lib/handlers.go b/blues-expert/lib/handlers.go
index 285b4a6..5bd5d2d 100644
--- a/blues-expert/lib/handlers.go
+++ b/blues-expert/lib/handlers.go
@@ -41,6 +41,16 @@ var docs embed.FS
 
 // Firmware Tools
 func HandleFirmwareEntrypointTool(ctx context.Context, request *mcp.CallToolRequest, args FirmwareEntrypointArgs) (*mcp.CallToolResult, any, error) {
+
+	if args.Sdk == "" {
+		return &mcp.CallToolResult{
+			Content: []mcp.Content{
+				&mcp.TextContent{Text: "Error: SDK parameter is required and cannot be empty. Valid values are: Arduino, C, Zephyr, Python"},
+			},
+			IsError: true,
+		}, nil, nil
+	}
+
 	// Get the SDK & Index file - convert to lowercase for directory name
 	sdk := strings.ToLower(args.Sdk)
 	indexFile := fmt.Sprintf("docs/%s/index.md", sdk)