Borrowing it
Nothing to install: this file belongs to ohah/react-native-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/ohah/react-native-mcp/main/.cursor/skills/tool-evaluate-script/SKILL.mdgit clone --depth 1 https://github.com/ohah/react-native-mcpWrote 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/skills/ohah/react-native-mcp/tool-evaluate-script)<a href="https://agentmods.dev/skills/ohah/react-native-mcp/tool-evaluate-script"><img src="https://agentmods.dev/badge/skills/ohah/react-native-mcp/tool-evaluate-script/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.
<a href="https://agentmods.dev/skills/ohah/react-native-mcp/tool-evaluate-script"><img src="https://agentmods.dev/badge/skills/ohah/react-native-mcp/tool-evaluate-script.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00025 | $0.00210 |
| Opus 5.5 | $0.00010 | $0.00084 |
| Sonnet 5.5 | $0.00005 | $0.00042 |
| Haiku 4.5 | $0.00003 | $0.00021 |
Grade A, and why
tool-evaluate-script 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 2mo 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.
What it actually says
evaluate_script
동작
- 서버가 function(문자열)과 선택 args(배열)를 앱에 eval로 전송. 앱은 JS 컨텍스트에서 함수를 실행하고 JSON 직렬 가능한 결과 반환. Chrome DevTools MCP와 동일(function + args).
- 다른 도구로 못 하는 일회성 조회/액션(예: 상태 읽기, 전역 호출)에 사용. WebSocket으로 앱 연결 필요.
제한 (require 불가)
require()는 사용할 수 없다. React Native(Metro)는 빌드 타임에 번들하므로, 앱 런타임에서 동적으로require(...)로 모듈을 불러오거나 eval로 실행하는 것은 불가능하다. 함수 안에서는 이미 로드된 앱 코드와 전역만 사용해야 한다.
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.
- 2mo ago First seen · 16 lines · 25 tokens per session scan A 697999b2b7a0
tool-evaluate-script is a skill published in the GitHub repository ohah/react-native-mcp (7 stars, last pushed 7mo ago), licensed MIT. It adds 25 tokens to every session and 210 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 2026-08-31.
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