Using emacs mcp.el and gptel.

I get a proto buffer schema error that 'type' is not a list type.

The issue is that tool-system/tool-schema :scratch-pad defines a vector of types for "value".

Looking at the official spec, it also does not look like "type" is allowed to be multiple:

https://spec.openapis.org/oas/v3.0.3#data-types