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 NimbleBrainInc/mcp-registry-tools --skill mcp_registry_toolsgit clone --depth 1 https://github.com/NimbleBrainInc/mcp-registry-toolsWrote 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/nimblebraininc/mcp-registry-tools/mcp_registry_tools)<a href="https://agentmods.dev/skills/nimblebraininc/mcp-registry-tools/mcp_registry_tools"><img src="https://agentmods.dev/badge/skills/nimblebraininc/mcp-registry-tools/mcp_registry_tools/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/nimblebraininc/mcp-registry-tools/mcp_registry_tools"><img src="https://agentmods.dev/badge/skills/nimblebraininc/mcp-registry-tools/mcp_registry_tools.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 | $0.00145 |
| Opus 5 | $0.00000 | $0.00072 |
| Sonnet 5 | $0.00000 | $0.00029 |
| Haiku 4.5 | $0.00000 | $0.00015 |
Grade A, and why
mcp_registry_tools 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
Registry Tools
Tool Selection
| Intent | Tool |
|---|---|
| Find available MCP servers | registry_search(query) |
| Get package details/requirements | registry_resolve(package, version?) |
Multi-Step Workflows
Find and inspect an MCP server
registry_search(query)to find matching serversregistry_resolve(package)to check credential requirements and available tools
Key Patterns
- Always call
registry_resolveafter finding a package to see its full details and credential requirements. - Search is fuzzy. Try different terms if the first search doesn't find what you need.
- Results include verification status and certification level to help assess trust.
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 · 21 lines · 0 tokens per session scan A 258ef9280d3b
mcp_registry_tools is a skill published in the GitHub repository NimbleBrainInc/mcp-registry-tools (0 stars, last pushed 3mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 145 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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