Permission prompts now say "deny unless expected" when they cannot show what you are approving

The tool-permission dialog gained explicit warning text for parameters it cannot render: non-object parameters, too many parameters, values over the size budget, and values that fail the depth or element budget. Instead of showing a partial or empty preview, the affected row is replaced with a warning like "(parameters are not an object — deny unless expected)" or "(value too large or too deeply nested to render — deny unless expected)".

These strings are entirely new and appear unconditionally whenever the dialog hits unrenderable input.