eventName
tool_call_pre (Gemini)
displayName
tool_call_pre (Gemini)
kind
native
originVendor
Google
direction
pre
blocking
true
family
shell-hook
payloadSchema
type
object
required
properties
tool_name
tool_input
session_id
description
Gemini CLI's pre-tool hook. Fired before each tool invocation;
subscribers can deny, mutate args, or inject context. Canonicalizes
to PreToolUse via hooks-mux mapping.