fix: remove unnecessary fields from tools' inputSchema (#856)

crates/rmcp/tests/test_complex_schema.rs

@@ -91,7 +91,6 @@ fn expected_schema() -> serde_json::Value {
       "required": [
         "messages"
       ],
-      "title": "ChatRequest",
       "type": "object"
     })
 }

crates/rmcp/tests/test_list_tools_result.rs

@@ -0,0 +1,40 @@
+#![cfg(all(feature = "server", feature = "macros", not(feature = "local")))]
+
+use rmcp::{
+    handler::server::wrapper::Parameters,
+    model::{ListToolsResult, NumberOrString, ServerJsonRpcMessage, ServerResult},
+};
+
+/// Parameters for adding two numbers.
+#[derive(Debug, serde::Deserialize, schemars::JsonSchema)]
+struct AddRequest {
+    /// The left-hand number.
+    a: f64,
+    /// The right-hand number.
+    b: f64,
+}
+
+/// Add two numbers.
+#[rmcp::tool]
+fn add(Parameters(AddRequest { a, b }): Parameters<AddRequest>) -> String {
+    (a + b).to_string()
+}
+
+#[test]
+fn list_tools_result_matches_expected_json() {
+    let expected_json = std::fs::read("tests/test_list_tools_result/list_tools_result.json")
+        .expect("missing expected list tools result JSON fixture");
+    let expected: serde_json::Value =
+        serde_json::from_slice(&expected_json).expect("invalid expected JSON fixture");
+
+    assert_eq!(add(Parameters(AddRequest { a: 1.0, b: 2.0 })), "3");
+
+    let result = ListToolsResult::with_all_items(vec![add_tool_attr()]);
+    let response = ServerJsonRpcMessage::response(
+        ServerResult::ListToolsResult(result),
+        NumberOrString::Number(2),
+    );
+
+    let actual = serde_json::to_value(response).expect("failed to serialize list tools response");
+    assert_eq!(actual, expected);
+}

crates/rmcp/tests/test_list_tools_result/list_tools_result.json

@@ -0,0 +1,32 @@
+{
+    "result": {
+        "tools": [
+            {
+                "name": "add",
+                "description": "Add two numbers.",
+                "inputSchema": {
+                    "$schema": "https://json-schema.org/draft/2020-12/schema",
+                    "type": "object",
+                    "properties": {
+                        "a": {
+                            "description": "The left-hand number.",
+                            "format": "double",
+                            "type": "number"
+                        },
+                        "b": {
+                            "description": "The right-hand number.",
+                            "format": "double",
+                            "type": "number"
+                        }
+                    },
+                    "required": [
+                        "a",
+                        "b"
+                    ]
+                }
+            }
+        ]
+    },
+    "jsonrpc": "2.0",
+    "id": 2
+}