Symptom

After upgrading, the agent fails before calling any tool.

Evidence what you'll see

Same workflow works on 2.15 and fails on 2.17.x
Affects built-in app tools connected to the agent

Cause

The reporter traced it to a regression in how tool schemas are generated in 2.17.x. No upstream root cause was posted.

Fix steps

0 of 3 done

Step 1Confirm the version where it started.
Step 2Workaround from the reporter: go back to 2.15 until a fixed release is confirmed.
Step 3Test the latest release on a copy before upgrading production.

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Verify the fix worked

The agent calls a connected tool successfully.

Did this fix it?

Sources and credit

Summarized in our own words from these public reports. Credit goes to their authors.

n8n issue #29353 ↗

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