Scored across 3 tools
comparar_ofertas is clearly the action tool, while the two leer_factura_* tools are split by input source (QR text vs. file path) and the descriptions explicitly state which to use in each case. The two read tools share the same output purpose, so there is slight conceptual overlap, but the input distinction is documented well enough to avoid misselection.
All three names follow a consistent Spanish verb_noun snake_case pattern (comparar_ofertas, leer_factura_qr, leer_factura_archivo). The two leer_factura_* variants differ only by a meaningful suffix, so the convention is predictable throughout.
Three tools is on the lean side but fits the narrow scope of comparing offers and reading bill QR data. Each tool earns its place; the set is not padded, though it leaves little room for adjacent needs like gas bill parsing.
The core lifecycle is covered: compare light/gas offers, extract QR data from text, and extract it from a file. Minor gaps remain (e.g., no gas-bill QR reading, only electricity), but these are edge cases an agent can work around since comparison also accepts explicit cp/consumo arguments.