August 27, 2026 · By CJ
Why Is My AI Agent Not Working?
When an agent stops working, it almost never "broke." Four specific things go wrong far more often, and checking them in order finds most failures by the second check.
A lamp that won't come on gets checked for whether it's plugged in before anyone calls it broken. Agents deserve the same order of operations.
The four things, in the order to check them
Started. The trigger didn't fire, so nothing ran, no error and no output because there was nothing to fail. Access. A password rotated, a permission got revoked, somebody left. Input shape. A report gained a column and nobody said so. Instructions. It's doing exactly what you asked, and what you asked stopped matching what you wanted.
Absence looks like failure
The first check is the one people skip, because a trigger that never fired produces nothing: no error, no log entry, no clue. It looks like the agent failed silently. It didn't fail. It never started. which is what a trigger actually is.
Write down which one it was
The same failure tends to recur. A password that rotates once will rotate again. Keeping a one-line record of which of the four it was turns the next outage into a thirty-second fix instead of a re-investigation.
Why did my AI agent stop working?
Four things cause almost every failure: it never started (trigger didn't fire), access changed (a password or permission), the input changed shape, or it's doing exactly what you asked and the ask is stale. Check in that order.
How do I debug an AI agent that isn't running?
Check whether it started at all first. A trigger that never fires produces no error and no log entry, which looks exactly like silent failure but is actually absence.
What's the most common reason an automation silently stops?
Access changes are the second most common cause after a trigger never firing: a rotated password, a revoked permission, or someone leaving the company.