Update mcp_server

mcp_server

@@ -3,32 +3,34 @@ import sqlite3, json
 
 mcp = FastMCP("EnterpriseData")
 
+# In-memory SQLite
 conn = sqlite3.connect(":memory:", check_same_thread=False)
 cur = conn.cursor()
 
 cur.execute("""
-CREATE TABLE Customers (
+CREATE TABLE Customers(
     CustomerID INTEGER PRIMARY KEY AUTOINCREMENT,
     Name TEXT,
     Region TEXT,
     LastOrderDate TEXT
 )
 """)
+
 cur.executemany(
-    "INSERT INTO Customers (Name, Region, LastOrderDate) VALUES (?, ?, ?)",
+    "INSERT INTO Customers (Name, Region, LastOrderDate) VALUES (?,?,?)",
     [
         ("Acme Corp", "Northeast", "2024-12-01"),
-        ("Beta Inc", "West", "2025-06-01"),
+        ("Beta Inc", "West",      "2025-06-01"),
         ("Gamma Co", "Northeast", "2023-09-15"),
-        ("Delta LLC", "South", "2025-03-20"),
-        ("Epsilon Ltd", "Northeast", "2025-07-10")
+        ("Delta LLC", "South",    "2025-03-20"),
+        ("Epsilon Ltd", "Northeast","2025-07-10"),
     ]
 )
 conn.commit()
 
 @mcp.tool()
 def query_database(sql: str) -> str:
-    """Run a SQL query and return JSON."""
+    """Run SQL and return JSON rows."""
     try:
         cur.execute(sql)
         cols = [d[0] for d in cur.description or []]