diff --git a/docs/installation.ja.md b/docs/installation.ja.md
index 334d94e..9ead2a1 100644
--- a/docs/installation.ja.md
+++ b/docs/installation.ja.md
@@ -66,6 +66,7 @@ A browser window should have opened automatically. Sign in on GitHub, then retry
     "github-webhook-mcp": {
       "command": "npx",
       "args": ["github-webhook-mcp"],
+      "alwaysLoad": true,
       "env": {
         "WEBHOOK_WORKER_URL": "https://github-webhook-mcp.example.workers.dev",
         "WEBHOOK_CHANNEL": "1"
@@ -77,6 +78,8 @@ A browser window should have opened automatically. Sign in on GitHub, then retry
 
 `WEBHOOK_CHANNEL=1` でリアルタイムチャンネル通知を有効化（Claude Code CLI のみ）。
 
+`alwaysLoad: true` は Claude Code v2.1.121 以降で利用可能。本サーバーのツールを tool-search の deferral 対象から外し、毎ターン即座に利用可能にします（UserPromptSubmit hook 経由で毎ターン呼ばれるため推奨）。
+
 ### Codex — config.toml
 
 ```toml
diff --git a/docs/installation.md b/docs/installation.md
index ec33332..067f8ca 100644
--- a/docs/installation.md
+++ b/docs/installation.md
@@ -66,6 +66,7 @@ A browser window should have opened automatically. Sign in on GitHub, then retry
     "github-webhook-mcp": {
       "command": "npx",
       "args": ["github-webhook-mcp"],
+      "alwaysLoad": true,
       "env": {
         "WEBHOOK_WORKER_URL": "https://github-webhook-mcp.example.workers.dev",
         "WEBHOOK_CHANNEL": "1"
@@ -75,6 +76,8 @@ A browser window should have opened automatically. Sign in on GitHub, then retry
 }
 ```
 
+`alwaysLoad: true` requires Claude Code v2.1.121 or later. It exempts this server's tools from tool-search deferral so they remain immediately callable every turn (recommended because the server is invoked every turn via the UserPromptSubmit hook).
+
 `WEBHOOK_CHANNEL=1` でリアルタイムチャンネル通知を有効化（Claude Code CLI のみ）。
 
 ### Codex — config.toml
diff --git a/mcp-server/README.md b/mcp-server/README.md
index d252ec0..c714ef5 100644
--- a/mcp-server/README.md
+++ b/mcp-server/README.md
@@ -62,7 +62,8 @@ Add the server to your MCP client configuration. Example for Claude Desktop (`cl
   "mcpServers": {
     "github-webhook": {
       "command": "npx",
-      "args": ["-y", "github-webhook-mcp"]
+      "args": ["-y", "github-webhook-mcp"],
+      "alwaysLoad": true
     }
   }
 }
@@ -76,6 +77,7 @@ To target a self-hosted Worker, set the `WEBHOOK_WORKER_URL` environment variabl
     "github-webhook": {
       "command": "npx",
       "args": ["-y", "github-webhook-mcp"],
+      "alwaysLoad": true,
       "env": {
         "WEBHOOK_WORKER_URL": "https://your-worker.example.workers.dev"
       }
@@ -84,6 +86,8 @@ To target a self-hosted Worker, set the `WEBHOOK_WORKER_URL` environment variabl
 }
 ```
 
+`alwaysLoad: true` requires Claude Code v2.1.121 or later. It exempts this server's tools from tool-search deferral so they remain immediately callable every turn (recommended because the server is invoked every turn via the UserPromptSubmit hook).
+
 ### Codex (`config.toml`)
 
 ```toml