Troubleshooting: How to Fix 'Tool Node' Bugs in n8n JSON
Press play on the video. It'll jump straight to the section that answers the
title above — no need to watch the full video.
Manual techniques for fixing bugs where Claude generates standard nodes instead of 'Tool Nodes' by editing the workflow's JSON code.
Understanding Node Shapes
In n8n, circular nodes are 'Tool Nodes,' while square nodes are regular nodes. AI Agents can only interact with circular nodes as 'tools'.
Known MCP Bug
Currently, there is a bug where the n8n MCP generates regular nodes instead of 'Tool Nodes.' If your nodes appear red or cannot connect to an AI Agent, this is likely the cause.
No-Code Alternative
If you aren't comfortable editing JSON, you can simply delete the regular node and manually search for the 'Tool' version within n8n (e.g., search for 'Airtable Tool'), then re-enter your settings.
More from Build & Deploy Autonomous AI Agents
View All
None
n8n
Analyzing Local Business Markets with n8n Google Maps Scraper
n8n
Google Maps
Connect n8n to Remote Server using SSH Node
n8n
Maintain Conversation History in n8n with Claude Code Session IDs
Claude
n8n
Set up your own n8n server on Hostinger—hassle-free
n8n
Hostinger
Setting up Telegram Bot and n8n AI Agent integration
n8n
Telegram