The three tools have distinguishable purposes: show loads ledger data into memory, open launches a browser view, and help returns format documentation. show and open are adjacent (both surface ledger content) and could momentarily be confused, but the descriptions make the boundary clear enough.

All three names are single lowercase verbs (show, open, help) following a consistent pattern with no camelCase/snake_case mixing. They deviate from a verb_noun convention and are generic verbs that only make sense in context, but they are internally consistent.

Three tools is small but each earns its place for what is essentially a ledger viewer: load, render, and document. It sits at the low end of the comfortable range without obviously missing a sibling tool within its stated display-only scope.

The surface covers only reading and rendering a ledger; there is no way to add, update, delete, or query time entries, nor to compute totals or filter by date range. For a 'Time Ledger' domain this leaves the core authoring and querying lifecycle entirely to external editing, which will cause agent dead ends.