Updates the content of an Apps Script project. You can add multiple script files (Code.gs, etc.) and the manifest (appsscript.json).
AI agents invoke updateScriptContent to trigger actions in Google Workspace MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
Modifying Apps Script project files is effectively arbitrary code injection — an attacker or misbehaving agent can write any JavaScript into .gs files and the manifest, which can then be executed with the permissions of the bound Google Workspace account (reading/exfiltrating Drive/Gmail/Sheets data, sending emails, etc.).
From the tool's definition Updates the content of an Apps Script project. You can add multiple script files (Code.gs, etc.) and the manifest (appsscript.json).
Documented attack patterns abuse exactly the kind of access updateScriptContent gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Google Workspace MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for updateScriptContent:
{
"version": "1",
"default": "deny",
"tools": {
"updateScriptContent": {
"limits": [
{
"counter": "updatescriptcontent_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}updateScriptContent stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
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Updates the content of an Apps Script project. You can add multiple script files (Code.gs, etc.) and the manifest (appsscript.json). It is categorised as a Execute tool in the Google Workspace MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Google Workspace MCP Server MCP server in PolicyLayer and add a rule for updateScriptContent: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Google Workspace MCP Server. Nothing to install.
updateScriptContent is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the updateScriptContent rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for updateScriptContent. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
updateScriptContent is provided by the Google Workspace MCP Server MCP server (sputnicyoji/google-workspace-mcp-with-script). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Google Workspace MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
72 Google Workspace MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.