From 0e90529c38fd028286d31fcc2c203324384d1f34 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adam=20Fory=C5=9B?= <adam.forys@gmail.com>
Date: Thu, 16 Oct 2025 11:05:37 +0200
Subject: [PATCH 1/2] Add nitialized message.

---
 R/client.R | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/R/client.R b/R/client.R
index 74004e5..a5ffa24 100644
--- a/R/client.R
+++ b/R/client.R
@@ -195,6 +195,7 @@ error_no_mcp_config <- function(call) {
 
 add_mcp_server <- function(process, name) {
   response_initialize <- send_and_receive(process, mcp_request_initialize())
+  send_and_receive(process, mcp_request_initialized())
   response_tools_list <- send_and_receive(process, mcp_request_tools_list())
 
   the$mcp_servers[[name]] <- list(
@@ -419,7 +420,13 @@ mcp_request_initialize <- function() {
 }
 
 # step 2: send initialized notification
-# This is a MAY in the protocol, so omitting.
+mcp_request_initialized <- function() {
+  list(
+    jsonrpc = "2.0",
+    method = "notifications/initialized"
+  )
+}
+
 
 # step 3: request the list of tools
 mcp_request_tools_list <- function() {

From 0f2f40e1430973934a2ebf8902f1e683d3f84bd0 Mon Sep 17 00:00:00 2001
From: simonpcouch <simonpatrickcouch@gmail.com>
Date: Sun, 19 Oct 2025 13:01:47 -0400
Subject: [PATCH 2/2] add NEWS entry

---
 NEWS.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/NEWS.md b/NEWS.md
index d1288da..0d117da 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,5 +1,6 @@
 # mcptools (development version)
 
+* `mcp_tools()` now sends and receives a `"notifications/initialized"` (#77 by @galachad).
 * `mcp_session()` now returns invisibly the nanonext socket used for communicating with the server.
 * `mcp_server()` gains logical argument `session_tools`, allowing users to opt-out of presenting R sessions tools to clients.