From c54309598505007c4467f78fa7dfb3e7c763679c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pierre-=C3=89lie=20Fauch=C3=A9?=
 <pierre-elie@makenotion.com>
Date: Sat, 18 Oct 2025 03:12:42 -0400
Subject: [PATCH] fix: Zod to JSONSchema pipe strategies (#962)

---
 src/server/mcp.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/server/mcp.ts b/src/server/mcp.ts
index cef1722d..765ba864 100644
--- a/src/server/mcp.ts
+++ b/src/server/mcp.ts
@@ -104,7 +104,8 @@ export class McpServer {
                             description: tool.description,
                             inputSchema: tool.inputSchema
                                 ? (zodToJsonSchema(tool.inputSchema, {
-                                      strictUnions: true
+                                      strictUnions: true,
+                                      pipeStrategy: 'input'
                                   }) as Tool['inputSchema'])
                                 : EMPTY_OBJECT_JSON_SCHEMA,
                             annotations: tool.annotations,
@@ -113,7 +114,8 @@ export class McpServer {
 
                         if (tool.outputSchema) {
                             toolDefinition.outputSchema = zodToJsonSchema(tool.outputSchema, {
-                                strictUnions: true
+                                strictUnions: true,
+                                pipeStrategy: 'output'
                             }) as Tool['outputSchema'];
                         }