Each tool targets a distinguishable action: setting a single state, playing a keyframe timeline, reading status, and speaking text. There is mild overlap since bip_set_state also controls speaking mouth animation while bip_speak synchronizes mouth/gaze/blink, so an agent might hesitate over which to use for mouth motion, but the descriptions clarify the intended split.

All four tools use a consistent snake_case pattern with the shared 'bip_' prefix and a verb-led name (set_state, play_timeline, get_status, speak). The convention is predictable and readable across the whole surface.

Four tools is on the lean side but each covers a distinct facet (state, sequence playback, status, speech) of driving a physical pet device. It is slightly thin — no separate stop/reset tool — but nothing feels redundant.

The core actions (set expression, play animation, speak, read status) are covered, but there is no way to stop or interrupt a running timeline, reset to a known idle state, or enumerate valid expressions/gazes. These gaps will force agents to improvise when recovering from an animation or discovering valid state values.