Each tool maps to a distinct resource or view (connections, accounts, balance, transactions, invoices, investments, spend-by-category), and the aggregation tool is clearly separated from raw transactions. The only mild overlap is saldo versus listar_contas, since the account list already includes bank-reported balances, but the descriptions distinguish a single-account lookup from a full listing.

All names are lowercase snake_case in Portuguese, which is readable, but the convention is mixed: listar_conexoes and listar_contas are verb_noun, while saldo, transacoes, faturas and investimentos are bare nouns, and gastos_por_categoria is a noun-phrase aggregation name. There is a discernible theme but no single predictable pattern.

Seven tools is a well-scoped surface for a read-only Open Finance data plugin, with each tool covering a distinct data domain. Nothing appears redundant or missing at the count level.

The surface covers the core read-only domain: connections, accounts, balances, transactions, credit card invoices, investments and a spending aggregation. Minor gaps exist, such as no income-by-category or per-transaction detail tool, but an agent can work around these using the existing period queries.