MCP Trigger Feature Request - Parameter Pass-Through

Feature Requests
1

The MCP Trigger needs a parameter pass-through.

For example, I always want to send an auth token rather than use n8n credentials. Currently the only way to do this within n8n, is to give AI the token and ask it to pass it through; however, there are security risks with this, and the AI often gets the token wrong.

I know this is doable via code, as I can inject a parameter directly via my backend to the MCP Trigger/Server, but this can currently not be done within n8n itself.

2

Seconded, this is quite valuable for improving the grounding/security of an AI agent triggered by a chat widget on a website, where you could have one or more parameters live fully outside the prompt scope, like a token or customer number that can’t be altered by whatever the LLM might be tricked into doing. I’ve used this with HTTP functions and workflow-as-a-tool nodes a lot, but MCP loses that option.