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.

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

It prevents potentially consequential actions from running without authorization.

before-tool — Skill for Cursor by ericlovold/sanction

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: Cursor.

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.

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.

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 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 440 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.

Model	Per session	Once invoked
Fable 5.1	$0.00036	$0.00440
Opus 5.5	$0.00014	$0.00176
Sonnet 5.5	$0.00007	$0.00088
Haiku 4.5	$0.00004	$0.00044

Measured 23d ago against content hash 8189408f9cb9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 23d 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.

23d ago Changed · -2 tokens per session 8189408f9cb9
1mo 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 36 tokens to every session and 440 once invoked, about $0.0001 per session on Opus 5.5. 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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