diff --git a/README.md b/README.md
index 09ccb30..f2915cd 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,9 @@ An MCP (Model Context Protocol) Bundle that exposes Obsidian CLI capabilities to
 
 - Node.js >= 18.0.0
 - Obsidian CLI installed and configured
-- Obsidian application installed
+- Obsidian application installed and **running**
+
+> **Important:** The Obsidian application must be open and running before using any MCP tools. The CLI used by this bundle communicates with the running Obsidian instance. If Obsidian is not running, commands will launch the GUI instead of executing — start Obsidian first, then use the MCP tools.
 
 ### Install via Claude Desktop
 
@@ -194,7 +196,9 @@ Contributions are welcome! Please ensure:
 
 ### "Obsidian not running" error
 
-Start the Obsidian application before using MCP tools.
+The Obsidian application must be running before using any MCP tools. The CLI communicates with the running Obsidian instance — if Obsidian is closed, commands will launch the GUI app instead of executing.
+
+**Fix:** Open the Obsidian application and wait for it to fully load, then retry the operation.
 
 ### "Vault not found" error