From 921ce70fa3acf1cb626bc7ff5088f358727be335 Mon Sep 17 00:00:00 2001
From: sinedied <noda@free.fr>
Date: Mon, 9 Jun 2025 14:17:53 +0200
Subject: [PATCH] fix: missing "properties" property in empty schema

---
 src/server/mcp.test.ts | 1 +
 src/server/mcp.ts      | 1 +
 2 files changed, 2 insertions(+)

diff --git a/src/server/mcp.test.ts b/src/server/mcp.test.ts
index 49f852d6..fd71443d 100644
--- a/src/server/mcp.test.ts
+++ b/src/server/mcp.test.ts
@@ -265,6 +265,7 @@ describe("tool()", () => {
     expect(result.tools[0].name).toBe("test");
     expect(result.tools[0].inputSchema).toEqual({
       type: "object",
+      properties: {},
     });
 
     // Adding the tool before the connection was established means no notification was sent
diff --git a/src/server/mcp.ts b/src/server/mcp.ts
index 5b864b8b..436a948f 100644
--- a/src/server/mcp.ts
+++ b/src/server/mcp.ts
@@ -1018,6 +1018,7 @@ export type RegisteredTool = {
 
 const EMPTY_OBJECT_JSON_SCHEMA = {
   type: "object" as const,
+  properties: {},
 };
 
 // Helper to check if an object is a Zod schema (ZodRawShape)