suite tools incorrectly expand nargs

Given a tool 'foo' in a suite, that just echoes the args given, the following happens:

```
]$ foo '$USER'
ajohns

# expected result:
]$ foo '$USER'
$USER
```

Start by reproducing the suite tool case with `foo '$USER'` and trace the argument handling for tools inside a suite. Compare the observed expansion with the expected literal `$USER` output; done means quoted arguments remain unchanged when passed to the tool.

Written by the indexing model from the issue text.