Improved code by updating any interfaces

Change-Id: I9a2e630c37f3c427569f5bbd773978c2705dc08c
diff --git a/tools/registry_test.go b/tools/registry_test.go
index 4e70978..1c1693d 100644
--- a/tools/registry_test.go
+++ b/tools/registry_test.go
@@ -12,7 +12,7 @@
 type mockTool struct {
 	name        string
 	description string
-	schema      map[string]interface{}
+	schema      map[string]any
 }
 
 func (t *mockTool) Name() string {
@@ -23,7 +23,7 @@
 	return t.description
 }
 
-func (t *mockTool) InputSchema() map[string]interface{} {
+func (t *mockTool) InputSchema() map[string]any {
 	return t.schema
 }
 
@@ -44,7 +44,7 @@
 	tool := &mockTool{
 		name:        "test-tool",
 		description: "A test tool",
-		schema: map[string]interface{}{
+		schema: map[string]any{
 			"type": "object",
 		},
 	}