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 skills add hzcsj/apple-mail-readonly-mcp --skill apple-mail-readonlygit clone --depth 1 https://github.com/hzcsj/apple-mail-readonly-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/hzcsj/apple-mail-readonly-mcp/apple-mail-readonly)<a href="https://agentmods.dev/skills/hzcsj/apple-mail-readonly-mcp/apple-mail-readonly"><img src="https://agentmods.dev/badge/skills/hzcsj/apple-mail-readonly-mcp/apple-mail-readonly/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/hzcsj/apple-mail-readonly-mcp/apple-mail-readonly"><img src="https://agentmods.dev/badge/skills/hzcsj/apple-mail-readonly-mcp/apple-mail-readonly.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 | $0.00033 | $0.00214 |
| Opus 5 | $0.00016 | $0.00107 |
| Sonnet 5 | $0.00007 | $0.00043 |
| Haiku 4.5 | $0.00003 | $0.00021 |
Grade A, and why
apple-mail-readonly 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 11d 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
Use this skill only for explicit user requests involving local Apple Mail / Mail.app.
Rules:
- Use only these tools: mail_health_check, mail_permissions_check, mail_list_accounts, mail_list_mailboxes, mail_search_messages, mail_read_message, mail_read_thread, mail_list_attachments.
- Prefer metadata first. Read full bodies only after the user asks a scoped question or a specific result is selected.
- Do not send, draft, reply, forward, move, delete, archive, mark, flag, export, open attachments, or update the plugin.
- Ask for narrower criteria before broad mailbox-wide reading.
- Exclude Junk, Trash, and Drafts unless the user explicitly asks for them.
- Summarize sensitive content minimally and only to satisfy the user's request.
- Do not print credentials, full headers, local Mail storage paths, or unrelated message content.
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.
- 11d ago First seen · 16 lines · 33 tokens per session scan A 845557691bdf
apple-mail-readonly is a skill published in the GitHub repository hzcsj/apple-mail-readonly-mcp (0 stars, last pushed 2mo ago), licensed MIT. It adds 33 tokens to every session and 214 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 2026-08-31.
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