Follow-up to #24.
This PR fixes the following error when using `bin/console`:
```console
$ bin/console
/Users/koic/.rbenv/versions/3.4.4/lib/ruby/3.4.0/bundled_gems.rb:82:
in 'Kernel.require': cannot load such file -- model_context_protocol (LoadError)
from /Users/koic/.rbenv/versions/3.4.4/lib/ruby/3.4.0/bundled_gems.rb:82:
in 'block (2 levels) in Kernel#replace_require'
from bin/console:5:in '<main>'
```