Moneyless clearinghouse: barter netting for agent services

Each tool has a clearly distinct purpose: post_need and post_offer handle opposite sides of the barter market, clear_now runs netting, and ledger_check reads conservation totals. There is no meaningful overlap that would cause misselection.

post_need and post_offer follow a consistent verb_noun pattern, but clear_now uses verb_time and ledger_check uses noun_verb. The naming is readable but mixed rather than uniform.

Four tools cover the core clearinghouse workflow: posting needs, posting offers, clearing, and checking totals. The set is well-scoped with no redundant or filler tools.

The surface supports posting and clearing, but there is no way to list or get individual open needs/offers, update or cancel postings, or inspect specific clearing results. These are notable gaps for a market where agents need visibility before clearing.