From 53ac1d52cd9d8df10881f72a31a49450ab9c21e1 Mon Sep 17 00:00:00 2001
From: vblagoje <458335+vblagoje@users.noreply.github.com>
Date: Wed, 22 Oct 2025 13:27:43 +0000
Subject: [PATCH 1/2] Update changelog for integrations/mcp

---
 integrations/mcp/CHANGELOG.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/integrations/mcp/CHANGELOG.md b/integrations/mcp/CHANGELOG.md
index 79d276b984..1309fc9918 100644
--- a/integrations/mcp/CHANGELOG.md
+++ b/integrations/mcp/CHANGELOG.md
@@ -1,5 +1,16 @@
 # Changelog
 
+## [integrations/mcp-v0.9.0] - 2025-10-22
+
+### 📚 Documentation
+
+- Add pydoc configurations for Docusaurus (#2411)
+- Fix docstrings to avoid errors in API reference generation (#2423)
+
+### 🌀 Miscellaneous
+
+- Add MCPTool/MCPToolset warm_up (#2384)
+
 ## [integrations/mcp-v0.8.0] - 2025-10-14
 
 ### 🐛 Bug Fixes

From aeb2b73d35b31d9d218baaae65f1425db18164dd Mon Sep 17 00:00:00 2001
From: Vladimir Blagojevic <dovlex@gmail.com>
Date: Wed, 22 Oct 2025 15:36:28 +0200
Subject: [PATCH 2/2] Document `eager_connect` parameter in CHANGELOG

Added `eager_connect` parameter to `MCPTool` and `MCPToolset` with details on its behavior and usage.
---
 integrations/mcp/CHANGELOG.md | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/integrations/mcp/CHANGELOG.md b/integrations/mcp/CHANGELOG.md
index 1309fc9918..8e99f31ee5 100644
--- a/integrations/mcp/CHANGELOG.md
+++ b/integrations/mcp/CHANGELOG.md
@@ -10,6 +10,27 @@
 ### 🌀 Miscellaneous
 
 - Add MCPTool/MCPToolset warm_up (#2384)
+- Added `eager_connect` parameter to `MCPTool` and `MCPToolset` (default: `False`).
+  
+  **When `eager_connect=False` (default)**:
+  - Connection deferred until first use or `warm_up()` call
+  - Fast initialization, enables pipeline validation without server availability
+  - Recommended for most use cases
+  
+  **When `eager_connect=True`**:
+  - Connects immediately during initialization
+  - Fail-fast validation, tool schema available immediately
+  - Use when you need upfront validation
+  - Existing agent/pipelines should set `eager_connect=True` to keep the behaviour from previous releases
+  
+  ```python
+  # Lazy connection (default)
+  tool = MCPTool(name="weather", server_info=info)
+  
+  # Eager connection
+  tool = MCPTool(name="weather", server_info=info, eager_connect=True)
+  ```
+- See related https://github.com/deepset-ai/haystack/pull/9856 for more details
 
 ## [integrations/mcp-v0.8.0] - 2025-10-14