Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add hooks/itallstartedwithaidea/google-ads-gemini-extension/before-toolgit clone --depth 1 https://github.com/itallstartedwithaidea/google-ads-gemini-extensionWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/hooks/itallstartedwithaidea/google-ads-gemini-extension/before-tool)<a href="https://agentmods.dev/hooks/itallstartedwithaidea/google-ads-gemini-extension/before-tool"><img src="https://agentmods.dev/badge/hooks/itallstartedwithaidea/google-ads-gemini-extension/before-tool.svg" alt="Measured on agentmods" height="20"></a>Grade A, and why
BeforeTool scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.
A static scan of the commands this hook runs, not an audit. A hook is shell that executes on your machine at the event it names, which is why every command in it is printed with what was found.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
{
"BeforeTool": [
{
"matcher": "run_gaql",
"hooks": [
{
"type": "command",
"command": "node ${extensionPath}/hooks/validate-gaql.js",
"name": "validate-gaql",
"description": "Validates GAQL queries to prevent write operations"
}
]
}
]
}What else hooks.json configures
This page is one entry in a file that holds 2. Installing the file brings all of them; each is measured and scanned on its own page.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 5d ago First seen · 15 lines scan A e435d8b77cfd
BeforeTool is a hook published in the GitHub repository itallstartedwithaidea/google-ads-gemini-extension (8 stars, last pushed 1mo ago), licensed MIT. Its token cost is not measured: a hook is shell that never enters the context. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other hooks, from other repositories
BeforeTool
Runs on the BeforeTool event for tool == "run_shell_command", tool == "run_shell_command", tool == "run_shell_command" && tool_input.command matches "^\\s*(npm (install, test, i, ci), pnpm (install, test, i), yarn (install, test, add, remove, upgrade), bun (install, test, i, add, remove), cargo build, make, docker…
AfterTool
Runs on the AfterTool event for tool == "run_shell_command", tool == "run_shell_command" && tool_input.command matches "^\\s*(npm run build, pnpm (run )?build, yarn (run )?build, bun (run )?build)\\b", tool == "edit_file" && tool_input.file_path matches "\\.(ts, tsx, js, jsx)$", tool == "edit_file" &&…
SessionStart
Runs when a session starts, executing run.js via node. From Jamkris/everything-gemini-code.
PreCompress
Runs on the PreCompress event, executing run.js via node. From Jamkris/everything-gemini-code.
SessionStart
Runs when a session starts, executing hook.js via node. From yideng-xl/gemini-cli-hud.
AfterTool
Runs on the AfterTool event, executing hook.js via node. From yideng-xl/gemini-cli-hud.