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.
git clone --depth 1 https://github.com/cesar-carlos/plug_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/rules/cesar-carlos/plug_mcp/mcp_protocol)<a href="https://agentmods.dev/rules/cesar-carlos/plug_mcp/mcp_protocol"><img src="https://agentmods.dev/badge/rules/cesar-carlos/plug_mcp/mcp_protocol/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/rules/cesar-carlos/plug_mcp/mcp_protocol"><img src="https://agentmods.dev/badge/rules/cesar-carlos/plug_mcp/mcp_protocol.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 | $0.00000 | $0.02566 |
| Opus 5.5 | $0.00000 | $0.01026 |
| Sonnet 5.5 | $0.00000 | $0.00513 |
| Haiku 4.5 | $0.00000 | $0.00257 |
Grade A, and why
mcp_protocol 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 yesterday.
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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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.
- yesterday Changed · +14 lines bb6c2dc457f9
- 2d ago Changed · +11 lines f61fab6c4fc0
- 3d ago Changed · +24 lines 52d1436d6d31
- 9d ago Changed c86f4aa051c4
- 11d ago Changed · +70 lines 3ca9a20f04f1
- 26d ago Changed d590311cc32e
- 28d ago Changed · +4 lines be2794763906
- 29d ago Changed 9ea0dabca16d
- 1mo ago Changed · +4 lines 24c01579dd40
- 1mo ago First seen · 30 lines · 0 tokens per session scan A 92e6a8263673
mcp_protocol is a cursor rule published in the GitHub repository cesar-carlos/plug_mcp (1 stars, last pushed yesterday), with no licence file. It costs nothing until one of its globs matches a file; then it loads 2,566 tokens. 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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