Borrowing it
Nothing to install: this file belongs to good-sender/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/good-sender/mcp/main/GEMINI.mdgit clone --depth 1 https://github.com/good-sender/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/instructions/good-sender/mcp/gemini-md)<a href="https://agentmods.dev/instructions/good-sender/mcp/gemini-md"><img src="https://agentmods.dev/badge/instructions/good-sender/mcp/gemini-md/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/instructions/good-sender/mcp/gemini-md"><img src="https://agentmods.dev/badge/instructions/good-sender/mcp/gemini-md.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 | $0.00338 | $0.00338 |
| Opus 5.5 | $0.00135 | $0.00135 |
| Sonnet 5.5 | $0.00068 | $0.00068 |
| Haiku 4.5 | $0.00034 | $0.00034 |
Grade A, and why
mcp GEMINI.md 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 4d 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
GoodSender for Gemini CLI
GoodSender publishes blog posts and sends newsletters and email through the hosted MCP server
at https://mcp.goodsender.com/. You sign in with your GoodSender account in the browser the
first time a tool runs (/mcp auth goodsender to sign in again).
Before you act
- Create posts as drafts first (
create_post); never publish in the same step. - Show the preview (
create_post_preview) and the distribution plan (get_post_distribution) and ask the user to confirm beforepublish_post,broadcast_postorreannounce_post. - Show a preview of the email contents and recipients, then ask the user to confirm before
any
enqueue_*orsend_*email tool. - Show a preview of the deletion targets, then ask the user to confirm before any
delete_*tool. - The hosted server has no
confirm_action: Gemini CLI's own tool confirmation prompt is the approval step, so never bypass or pre-answer it.
- Custom emails to recipients who have not consented are queued until they consent;
send_pending_emailssends the queue. Only the built-in transactional templates (send_consentless_email: OTP, MFA, login, password/email change, receipts) send right away. - Cold outreach is not supported; do not add recipients who did not ask to hear from the user.
Never
- Claim a capability a tool does not offer; if a tool returns an error, show it and stop.
- Invent DNS records, domain status or send results — read them from the tools.
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.
- 4d ago First seen · 29 lines · 338 tokens per session scan A d0946470eb0f
mcp GEMINI.md is an instructions file published in the GitHub repository good-sender/mcp (1 stars, last pushed 4d ago), licensed Apache-2.0. It adds 338 tokens to every session, about $0.0014 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 2026-11-03.
mcp GEMINI.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| mcp GEMINI.mdgood-sender/mcp | Instructions file | 1 | 4d ago | Apache-2.0 | A | 338 | Gemini CLI |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | yesterday | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |