fix(test): skip serialize tool's annotation if empty

crates/rmcp/src/model/tool.rs

@@ -18,6 +18,7 @@ pub struct Tool {
     pub description: Option<Cow<'static, str>>,
     /// A JSON Schema object defining the expected parameters for the tool
     pub input_schema: Arc<JsonObject>,
+    #[serde(skip_serializing_if = "Option::is_none")]
     /// Optional additional tool information.
     pub annotations: Option<ToolAnnotations>,
 }

crates/rmcp/tests/test_with_js/client.js

@@ -1,7 +1,7 @@
 import { Client } from "@modelcontextprotocol/sdk/client/index.js";
 import { SSEClientTransport } from "@modelcontextprotocol/sdk/client/sse.js";
 
-const transport = new SSEClientTransport( new URL(`http://127.0.0.1:8000/sse`));
+const transport = new SSEClientTransport(new URL(`http://127.0.0.1:8000/sse`));
 
 const client = new Client(
   {
@@ -26,3 +26,4 @@ console.log(templates);
 const prompts = await client.listPrompts();
 console.log(prompts);
 await client.close();
+await transport.close();

crates/rmcp/tests/test_with_js/server.js

@@ -32,4 +32,4 @@ server.tool(
 );
 
 const transport = new StdioServerTransport();
-await server.connect(transport);
+await server.connect(transport);