before-tool

before-tool is a skill for Claude Code, Codex from ericlovold/sanction. It costs 38 tokens per session (252 once invoked), scanned A, original, no licence file.

A permission check required before an agent uses another tool, runs a shell command, deploys software, or sends email. It blocks the action when approval is not granted.

In plain words
What is it for?
Use it as a gate before tool calls, terminal commands, deployments, and outgoing email.
Why use it?
It prevents potentially consequential actions from running without authorization.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Part of the sanction plugin — 4 skills shipped together

Good fit Use it as a gate before tool calls, terminal commands, deployments, and outgoing email.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ericlovold/sanction/before-tool
Install

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.

Any agent
npx skills add ericlovold/sanction --skill before-tool
Clone the repo
git clone --depth 1 https://github.com/ericlovold/sanction

Made for: Claude Code, Codex.

Or install sanction, the plugin that ships this one along with the rest of its 4 skills.

Wrote 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.

agentmods badge for before-tool

README.md
[![agentmods](https://agentmods.dev/badge/skills/ericlovold/sanction/before-tool/github.svg)](https://agentmods.dev/skills/ericlovold/sanction/before-tool)
Your own site
<a href="https://agentmods.dev/skills/ericlovold/sanction/before-tool"><img src="https://agentmods.dev/badge/skills/ericlovold/sanction/before-tool/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for before-tool

Your own site · 80×15
<a href="https://agentmods.dev/skills/ericlovold/sanction/before-tool"><img src="https://agentmods.dev/badge/skills/ericlovold/sanction/before-tool.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 252 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00038 $0.00252
Opus 5 $0.00019 $0.00126
Sonnet 5 $0.00008 $0.00050
Haiku 4.5 $0.00004 $0.00025

Measured 3d ago against content hash a67470bc6640, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

before-tool 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 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

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.

cursor-plugin/skills/before-tool/SKILL.md · 19 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Changes

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.

  1. 3d ago First seen · 19 lines · 38 tokens per session scan A a67470bc6640

Subscribe to this mod's changes

before-tool is a skill published in the GitHub repository ericlovold/sanction (3 stars, last pushed today), with no licence file. It adds 38 tokens to every session and 252 once invoked, about $0.0002 per session on Opus 5. 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 2026-09-08.

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