Symptom
A tool works the first time you use it, but fails on the next try in the same chat.Causes
- Your AI client is reusing outdated authentication context from earlier in the conversation.
- Your AI client cached tool metadata at the start of the session and is not requesting fresh data.
- A transient error during the first call left the client in an inconsistent state.
How to fix it
Reconnect if the problem continues
If the problem continues, disconnect and reconnect to the server from inside your AI client.
Check your server dashboard
Go to the Zapier MCP dashboard to confirm the tool is still listed on the Configure tab and no warning indicators appear next to the app connection.
Still need help?
- Ask in the Zapier Community for advice from experienced Zapier users.
- Contact the Zapier MCP team for feedback or help.