Borrowing it
Nothing to install: this file belongs to karthikcsq/google-tools-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/karthikcsq/google-tools-mcp/main/.claude/skills/live-agent-loop/SKILL.mdgit clone --depth 1 https://github.com/karthikcsq/google-tools-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/karthikcsq/google-tools-mcp/live-agent-loop)<a href="https://agentmods.dev/skills/karthikcsq/google-tools-mcp/live-agent-loop"><img src="https://agentmods.dev/badge/skills/karthikcsq/google-tools-mcp/live-agent-loop/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/karthikcsq/google-tools-mcp/live-agent-loop"><img src="https://agentmods.dev/badge/skills/karthikcsq/google-tools-mcp/live-agent-loop.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.02522 |
| Opus 5 | $0.00000 | $0.01261 |
| Sonnet 5 | $0.00000 | $0.00504 |
| Haiku 4.5 | $0.00000 | $0.00252 |
Grade A, and why
live-agent-loop 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 7d 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.
How it starts
The opening of the file, as written. The whole thing — 223 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Live agent loop
Unit tests prove a tool does what its author expected. They cannot prove a tool is usable by an agent that was handed a goal and no instructions. Those are different questions, and only the second one predicts what happens after release.
This skill runs the second test: give a subagent a real objective, make it reach the objective using only the MCP tools against the real Google API, and treat everything it struggled with as a defect.
The core rule
Friction is a bug. If the agent needed three attempts, guessed a parameter name, had to read the source, or worked around an error message that did not say what was wrong, that counts as a failure even though the task eventually succeeded. A future agent will hit the same wall with less patience.
Do not fix the mission to avoid the friction. Fix the tool.
Safety, before anything else
Every run touches a real Google account. The envelope is non-negotiable:
- Every write is confined to the sandbox Drive folder named by
GOOGLE_MCP_TEST_FOLDER_IDin.env.live-smoke. There is no default and no fallback; the runner refuses to start without it. - Gmail send paths are blocked at the harness level.
sendMessage,sendDraftand friends refuse inBLOCKED_TOOLS. - Containment is re-verified at cleanup time, so a run trashes exactly what it created inside the sandbox and nothing else.
Never disable, weaken, or route around any check in
scripts/live-smoke/guard.mjs. If the guard blocks something you believe is
legitimate, that is a finding to report, not an obstacle to remove.
The three harnesses, and when each applies
| Runner | Scope | Use it for |
|---|---|---|
npm run live-smoke |
checked-in scenarios with assertions, live/ |
regression: things we already decided to assert |
npm run live-call |
one tool, one process | a quick probe of a single tool you just changed |
npm run live-mission |
one multi-step task, one process | this loop: goal-driven work with real session state |
npm run live-coverage |
no network; static | which of the 160 tools live code actually drives, and which it does not |
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.
- 7d ago First seen · 223 lines · 0 tokens per session scan A 4ca95a093011
live-agent-loop is a skill published in the GitHub repository karthikcsq/google-tools-mcp (9 stars, last pushed 4d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,522 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 2026-09-05.
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