Web Evidence

Four verify_claim variants share the same core action but are differentiated by cost, source limits, and intended claim complexity. Descriptions provide clear tier boundaries, though an agent may still hesitate between standard, deep, and research tiers for borderline claims.

All tool names use consistent snake_case with a verb_noun pattern: list_verification_tiers and verify_claim plus tier suffixes (_quick, _deep, _research). The convention is predictable and readable.

Five tools is well-scoped for a verification service: one free tier-listing tool and four paid verification tiers. Each tier serves a distinct budget/coverage need, so no tool feels redundant.

The surface covers tier discovery and claim verification at multiple depths, which is the core domain. Minor gaps include no explicit tool for retrieving past verification results or managing account balance, but these are likely handled within the verify responses.