chore: consolidate repeated rmcp tests (#931)

crates/rmcp/tests/test_tool_routers.rs

@@ -11,20 +11,20 @@ use rmcp::{
 };
 
 #[derive(Debug, Default)]
-pub struct TestHandler<T: 'static = ()> {
-    pub _marker: std::marker::PhantomData<fn(*const T)>,
+struct TestHandler<T: 'static = ()> {
+    _marker: std::marker::PhantomData<fn(*const T)>,
 }
 
 impl<T: 'static> ServerHandler for TestHandler<T> {}
 #[derive(Debug, schemars::JsonSchema, serde::Deserialize, serde::Serialize)]
-pub struct Request {
-    pub fields: HashMap<String, String>,
+struct Request {
+    fields: HashMap<String, String>,
 }
 
 #[derive(Debug, schemars::JsonSchema, serde::Deserialize, serde::Serialize)]
-pub struct Sum {
-    pub a: i32,
-    pub b: i32,
+struct Sum {
+    a: i32,
+    b: i32,
 }
 
 #[rmcp::tool_router(router = test_router_1)]