diff --git a/.changeset/nice-eyes-say.md b/.changeset/nice-eyes-say.md
new file mode 100644
index 00000000..ae27af8d
--- /dev/null
+++ b/.changeset/nice-eyes-say.md
@@ -0,0 +1,5 @@
+---
+"agents": patch
+---
+
+mcp client: result schema and options are optional
diff --git a/packages/agents/src/mcp/client.ts b/packages/agents/src/mcp/client.ts
index 6187f195..837fdd64 100644
--- a/packages/agents/src/mcp/client.ts
+++ b/packages/agents/src/mcp/client.ts
@@ -201,10 +201,10 @@ export class MCPClientManager {
    */
   callTool(
     params: CallToolRequest["params"] & { serverId: string },
-    resultSchema:
+    resultSchema?:
       | typeof CallToolResultSchema
       | typeof CompatibilityCallToolResultSchema,
-    options: RequestOptions
+    options?: RequestOptions
   ) {
     const unqualifiedName = params.name.replace(`${params.serverId}.`, "");
     return this.mcpConnections[params.serverId].client.callTool(