diff --git a/.claude-plugin/marketplace.json b/.claude-plugin/marketplace.json
index 207720a9..f0f3a359 100644
--- a/.claude-plugin/marketplace.json
+++ b/.claude-plugin/marketplace.json
@@ -10,7 +10,7 @@
   "plugins": [
     {
       "name": "claude-mem",
-      "version": "4.1.0",
+      "version": "4.1.1",
       "source": "./plugin",
       "description": "Persistent memory system for Claude Code - context compression across sessions"
     }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e649db74..d4ef8b91 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,21 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 
+## [4.1.1] - 2025-10-21
+
+### Removed
+- **advanced_search tool**: Removed redundant MCP tool that provided no functionality beyond calling search_observations + search_sessions
+
+### Fixed
+- **MCP search limit bug**: Fixed findByConcept, findByType, and findByFile methods to properly respect limit/offset parameters
+- **Type contamination in concepts**: Added parser validation to prevent observation types from being added to concepts array
+- **Token limit warnings**: Added guidance in tool descriptions to start with 3-5 results to avoid MCP token limits
+
+### Changed
+- **Simplified MCP API**: Reduced from 7 to 6 search tools by removing the redundant advanced_search
+- **Improved search prompts**: Enhanced type and concept constraint language in SDK prompts to prevent AI contamination
+
+
 ## [4.1.0] - 2025-10-21
 
 ### Changed
diff --git a/package.json b/package.json
index 72e0715a..8218611f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "claude-mem",
-  "version": "4.1.0",
+  "version": "4.1.1",
   "description": "Memory compression system for Claude Code - persist context across sessions",
   "keywords": [
     "claude",