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/gemini-cli-extensions/spannerWrote 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/plugins/gemini-cli-extensions/spanner/spanner)<a href="https://agentmods.dev/plugins/gemini-cli-extensions/spanner/spanner"><img src="https://agentmods.dev/badge/plugins/gemini-cli-extensions/spanner/spanner/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/plugins/gemini-cli-extensions/spanner/spanner"><img src="https://agentmods.dev/badge/plugins/gemini-cli-extensions/spanner/spanner.svg" alt="Reviewed on agentmods" width="80" height="20"></a>Grade A, and why
spanner 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 15d 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
{
"name": "spanner",
"version": "0.3.6",
"description": "Connect and interact with Spanner data using natural language.",
"author": {
"name": "Google LLC",
"email": "[email protected]"
},
"homepage": "https://cloud.google.com/spanner",
"repository": "https://github.com/gemini-cli-extensions/spanner",
"license": "Apache-2.0",
"userConfig": {
"spanner_project": {
"title": "Project ID",
"description": "ID of the Google Cloud project",
"type": "string",
"sensitive": false
},
"spanner_instance": {
"title": "Instance",
"description": "ID of the Spanner instance",
"type": "string",
"sensitive": false
},
"spanner_database": {
"title": "Database",
"description": "ID of the Spanner database",
"type": "string",
"sensitive": false
},
"spanner_dialect": {
"title": "Database Dialect",
"description": "(Optional) The SQL dialect of the Spanner Database: 'googlesql' or 'postgresql'. (Default: 'googlesql')",
"type": "string",
"sensitive": false
}
},
"mcpServers": {
"spanner": {
"command": "npx",
"args": [
"-y",
"@toolbox-sdk/[email protected]",
"--prebuilt",
"spanner",
"--stdio"
],
"env": {
"SPANNER_PROJECT": "${user_config.spanner_project}",
"SPANNER_INSTANCE": "${user_config.spanner_instance}",
"SPANNER_DATABASE": "${user_config.spanner_database}",
"SPANNER_DIALECT": "${user_config.spanner_dialect}"
}
}
}
}
What it installs
The manifest is a name and a version. 1 MCP server travel with it, and installing the plugin installs all of them. Each is measured on its own page, and each can be installed alone.
What ships with it
1 file beside plugin.json 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.
- 15d ago Changed a3e0b782c3f6
- 1mo ago Changed · +43 lines f5acfc2d4952
- 1mo ago First seen · 14 lines scan A c8b3a465ae78
spanner is a plugin published in the GitHub repository gemini-cli-extensions/spanner (19 stars, last pushed 16d ago), licensed Apache-2.0. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-08-30.
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