Fetch a single Collection (a saved, named set of papers) by its slug.
Use the `slug` returned by `create_collection` or `search_collections`. Returns the Collection's identity, sharing,
access level, and DOI counts. The caller must have at least VIEWER access (own it, be shared on it, or it is public).
**Notes.** `noteCount` reports how many notes the Collection holds — free-text Markdown the team has written on it.
Pass `include_notes: true` to also get an index of up to 25 of them (id, title, author, timestamps, no bodies);
`notesTruncated: true` means there are more than the index shows. Use `list_collection_notes` to read note bodies, and
`create_collection_note` to add one. Notes are team-internal: `noteCount` and the index are only returned to members of
the Collection, so they are absent for a public Collection the caller merely has access to read.
**Papers.** This tool returns DOI *counts*, not the DOI list. To see or search the papers themselves, call
`search_literature` with `collection_slug` set to this slug.
**Parameters:**
- slug: The Collection slug (required).
- include_notes: If true, embed the note index described above (default: false).
**Returns:** The Collection with id, slug, name, description, isPublic, accessType, DOI counts, noteCount, and
`notes` when `include_notes` is set.