A maid does not carry a sword or a pistol. Her arsenal is composed of everyday items, repurposed for intelligence work.
Once you have successfully completed three spy missions as a noble’s maid, you may be ready for these advanced techniques: spy mission a nobles maid guide work
You must be the best damned maid in the manor. If your linens are wrinkled or the tea is cold, you are investigated. Max out "Starching" and "Silver Polishing" before any espionage skill. A flawless breakfast tray is a get-out-of-jail-free card. A maid does not carry a sword or a pistol