MCP Toolbox for Databases is an open-source Model Context Protocol server that connects AI agents, development environments, and applications to enterprise databases through ready-made or custom tools. It is for exploring schemas, querying data, generating code, and building specialized database tools for production agents. The catalogue includes its skills, instructions, and MCP server integration.
Borrowing it
Nothing to install: this file belongs to googleapis/mcp-toolbox. 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/googleapis/mcp-toolbox/main/GEMINI.mdgit clone --depth 1 https://github.com/googleapis/mcp-toolboxWrote 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/googleapis/mcp-toolbox/gemini-md)<a href="https://agentmods.dev/instructions/googleapis/mcp-toolbox/gemini-md"><img src="https://agentmods.dev/badge/instructions/googleapis/mcp-toolbox/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/googleapis/mcp-toolbox/gemini-md"><img src="https://agentmods.dev/badge/instructions/googleapis/mcp-toolbox/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 | $0.04020 | $0.04020 |
| Opus 5.5 | $0.01608 | $0.01608 |
| Sonnet 5.5 | $0.00804 | $0.00804 |
| Haiku 4.5 | $0.00402 | $0.00402 |
Grade A, and why
mcp-toolbox GEMINI.md scanned grade A with 1 finding 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 10d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
4. **Test Endpoint:** `curl http://127.0.0.1:5000` How it starts
The opening of the file, as written. The whole thing — 263 lines — stays where its author put it; the contents beside it link to each section on GitHub.
MCP Toolbox Context & Style Guide
This file (symlinked as CLAUDE.md, AGENTS.md, and .gemini/styleguide.md) provides context and guidelines for AI agents working on the MCP Toolbox for Databases project. It summarizes key information from CONTRIBUTING.md and DEVELOPER.md.
Project Overview
MCP Toolbox for Databases is a Go-based project designed to provide Model Context Protocol (MCP) tools for various data sources and services. It allows Large Language Models (LLMs) to interact with databases and other tools safely and efficiently.
Tech Stack
- Language: Go (1.23+)
- Documentation: Hugo (Extended Edition v0.146.0+)
- Containerization: Docker
- CI/CD: GitHub Actions, Google Cloud Build
- Linting:
golangci-lint
Key Directories
cmd/: Application entry points.internal/sources/: Implementations of database sources (e.g., Postgres, BigQuery).internal/tools/: Implementations of specific tools for each source.internal/prompts/: Implementations of MCP prompts.internal/resources/: Implementations of MCP resources and resource templates (e.g., text, file).internal/group/: Implementations of groups scoping tools, prompts, resources, and resource templates.tests/: Integration tests.evals/: Evalsets and harness configs for evaluating the prebuilt tool configs with EvalBench; run by.ci/evals.cloudbuild.yaml.docs/en: Project documentation. Separated logically into:documentation/: Documentation and concepts (Section I).integrations/: Reference architectures for DB connectivity and tools (Section II).samples/: Tutorials and code samples (Section III).reference/: CLI info and FAQs (Section IV).
Development Workflow
Prerequisites
- Go 1.23 or later.
- Docker (for building container images and running some tests).
- Access to necessary Google Cloud resources for integration testing (if applicable).
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.
- 10d ago Changed · +6 tokens per session 18980c148318
- 23d ago Changed · +11 lines · +229 tokens per session 237d51ce9c40
- 28d ago Changed · +88 tokens per session 8bc1ea59576e
- 1mo ago Changed · +4 lines · +86 tokens per session e07fcfd2cce7
- 1mo ago First seen · 248 lines · 3,611 tokens per session scan A b99bb31d4787
mcp-toolbox GEMINI.md is an instructions file published in the GitHub repository googleapis/mcp-toolbox (16,708 stars, last pushed today), licensed Apache-2.0. It adds 4,020 tokens to every session, about $0.0161 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.