I found a problem selecting some tools from my mcp server in n8n mcp client node

[Chouayb_Attia]

[King_Samuel_David]

Hey,

Do you have mcp server at port 3000? it just seems it’s having a connection error, is this connect to an ai agent btw?

Could u share workflow like this

Best regards,

Samuel

[Chouayb_Attia]

Hello Samuel please help me to solve this

all good with my mcp server the tools are configured well idont get why the ai agent doesnt exucte the tool when i enter a chat
and when i test the tool without an ai agent it work very well like this

[King_Samuel_David]

@Chouayb_Attia

Hey, you will need to specify the system prompt, in the ai agent,

How I Built a Multi-Agent AI System in n8n Using Sub-Workflows example

Hey, So I created this to help explain, This is my main agent, which has access to subworkflows with ai agents in them. it acts like the brain and decides what sub-agent should handle the request. next I connect the other agents via tools on the main agent, each call goes to these: ResearchAgent this one just calls another AI agent workflow with specific instructions for doing research (e.g. “look up current social media trends for skincare” or “explain how RAG work…

Checkout this post I made, let me know if this helps, I can provide further details if needed. But in essence, you need to get the ai agent to call it use the tool.

Oh and also, some model don;t; run well with tools, openai 4o has been most reliable for me.

Best regards,

Samuel

[Chouayb_Attia]

Thank you very well Samuel i will send the feedback to you soon

[Chouayb_Attia]

Thanks Samuel all good but the only problem that the main workflow doesnt pass data to the sub-agents workflows

how to make the principal ai agent pass data to the sub-agent to make the full process automated so i dont need to pass parametrs by myself like on the last picture in a way if i remove {“input”:“legorafi.fr”} the automation doesnt happen
Thanks you a lot for your help it very well appreciated

[King_Samuel_David]

Hey @Chouayb_Attia

I don’t suppose if you put example json to pass in the tool description would it work?

I’ll try look further into it soon otherwise.

Best regards,

Samuel

[Chouayb_Attia]

Thank you very very well Samuel you are a good man

[King_Samuel_David]

@Chouayb_Attia

How it go? If you want you can share workflow, I can see how it’s processing.

Best regards,

Samuel

[Chouayb_Attia]

Thank you very much Samuel the problem is tottally solved thanks for your help and your patience with me.