Tool boundaries are muddled because covidence_login duplicates the login action in covidence_nav, and covidence_screen returns a full prompt that covers the same reading/voting instructions available via covidence_nav. The remaining tools are distinct, but these overlapping pairs make selection ambiguous.

The consistent covidence_ prefix and snake_case help, but the forms are mixed: login and screen are bare verbs, nav is an abbreviation, while set_criteria, log_vote, and get_session_log follow a verb_noun pattern. This is readable but not a uniform naming convention.

With six tools, the server is well-scoped for its niche purpose of guiding Covidence screening sessions. The count is neither bloated nor too thin, and each tool contributes to the core workflow.

The core screening loop—login, set criteria, screen, log votes, and view the session log—is covered, with nav supplying supporting instructions for Chrome-driven actions. Minor gaps like no explicit criteria retrieval or session-end tool are workable but prevent a perfect score.