fix(mcp): prevent session cleanup CPU spin and reuse hangs

.env.example

@@ -187,6 +187,22 @@ LANGFLOW_SSRF_ALLOWED_HOSTS=
 # Default: true
 LANGFLOW_MCP_COMPOSER_ENABLED=
 
+# MCP session management tuning
+# These control the built-in MCPSessionManager that backs MCP tool components.
+#
+# LANGFLOW_MCP_SESSION_CLEANUP_INTERVAL – how often (seconds) the manager scans for idle
+# sessions to reap. Must be >= 30; values below 30 are clamped up to prevent a
+# tight CPU-spinning loop. Default: 120
+# LANGFLOW_MCP_SESSION_CLEANUP_INTERVAL=120
+#
+# LANGFLOW_MCP_SESSION_IDLE_TIMEOUT – sessions unused for this many seconds are closed.
+# Default: 400
+# LANGFLOW_MCP_SESSION_IDLE_TIMEOUT=400
+#
+# LANGFLOW_MCP_MAX_SESSIONS_PER_SERVER – cap on concurrent live sessions per MCP server
+# URL / command. Exceeding this drops the oldest session. Default: 10
+# LANGFLOW_MCP_MAX_SESSIONS_PER_SERVER=10
+
 # STORE_URL
 # Example: LANGFLOW_STORE_URL=https://api.langflow.store
 # LANGFLOW_STORE_URL=