Most tools target distinct failure modes (delay, hang, disconnect, malformed_message, duplicate_response, response_after_cancellation). Only ping and protocol_ping_liveness overlap somewhat as both concern liveness, but their descriptions differentiate normal responsiveness from protocol-level in-flight liveness.

All names are lowercase snake_case, but the set mixes bare verbs (ping, delay, hang, disconnect) with descriptive noun/adjective phrases (protocol_ping_liveness, malformed_message, duplicate_response, response_after_cancellation). This is readable but not a single predictable pattern.

Eight tools is well-scoped for a failure-injection lab. Each tool represents a distinct failure scenario or liveness check, so none feel redundant or out of place.

The set covers common failure modes: timeout/delay, hang, disconnect, malformed protocol messages, duplicate responses, and post-cancellation responses. Minor gaps remain, such as a valid JSON-RPC error response tool or out-of-order response injection, but core failure-lab needs are met.