FunctionToolParam constructor missing the "description" parameter

[lywing-god]

The ToolParamOfFunction constructor does not expose a description parameter, even though FunctionToolParam defines a Description field.

type FunctionToolParam struct {
	Strict param.Opt[bool] `json:"strict,omitzero,required"`
	Parameters map[string]any `json:"parameters,omitzero,required"` 
	Name string `json:"name,required"`
	Description param.Opt[string] `json:"description,omitzero"`
	Type constant.Function `json:"type,required"`
	paramObj
}

func ToolParamOfFunction(name string, parameters map[string]any, strict bool) ToolUnionParam {
	var function FunctionToolParam
	function.Name = name
	function.Parameters = parameters
	function.Strict = param.NewOpt(strict)
	return ToolUnionParam{OfFunction: &function}
}