Borrowing it
Nothing to install: this file belongs to costory-io/costory-finops-mcp-skills. 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/costory-io/costory-finops-mcp-skills/main/GEMINI.mdgit clone --depth 1 https://github.com/costory-io/costory-finops-mcp-skillsWrote 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/costory-io/costory-finops-mcp-skills/gemini-md)<a href="https://agentmods.dev/instructions/costory-io/costory-finops-mcp-skills/gemini-md"><img src="https://agentmods.dev/badge/instructions/costory-io/costory-finops-mcp-skills/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/costory-io/costory-finops-mcp-skills/gemini-md"><img src="https://agentmods.dev/badge/instructions/costory-io/costory-finops-mcp-skills/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 | $0.00273 | $0.00273 |
| Opus 5.5 | $0.00109 | $0.00109 |
| Sonnet 5.5 | $0.00055 | $0.00055 |
| Haiku 4.5 | $0.00027 | $0.00027 |
Grade A, and why
costory-finops-mcp-skills 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 18d 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
Costory FinOps MCP
You are connected to the Costory FinOps MCP (costory server). Costory holds normalized, allocated
cost data (AWS, GCP, Azure, Kubernetes, Snowflake, Datadog, OpenAI, Anthropic) for the user's workspace.
- Call
get_contextfirst in every conversation to load dimensions, popular group-bys and dashboards. - If it returns "Multiple organizations" with a list of slugs, ask the user which org to use (or call
list_organizations), then pass thatslugtoget_contextand the following tools. Use the org directly if the user already named it. - Use
queryfor cost, usage, metric, budget and formula questions; usesuggest_groupbybefore guessing a split. - To explain a cost change, compare periods with
query, then pulllist_eventsfor deploys in the same window. - Before any write (
create_alert,create_report,create_dashboard,publish_virtual_dimension), preview first (preview_alert,preview_report_widget,preview_virtual_dimension_draft) and confirm with the user. - Detailed workflows live in
plugins/costory/skills/*/SKILL.mdin this repository; callget_skillwhen available.
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.
- 18d ago First seen · 14 lines · 273 tokens per session scan A b0c14c6150a9
costory-finops-mcp-skills GEMINI.md is an instructions file published in the GitHub repository costory-io/costory-finops-mcp-skills (2 stars, last pushed 6d ago), licensed Apache-2.0. It adds 273 tokens to every session, about $0.0011 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 2026-10-10.
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