AI agents call listSheets to retrieve information from Google Drive MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves metadata about sheets within a spreadsheet without creating, modifying, or deleting data. It is purely informational and has minimal blast radius if misused by an AI agent—the only risk would be information disclosure of sheet names the user may not have intended to expose.
From the tool's definition Tool name 'listSheets' and description 'List tabs/sheets in a Google Spreadsheet' indicate a retrieval operation with no modification or side effects.
Documented attack patterns abuse exactly the kind of access listSheets gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Google Drive MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for listSheets:
{
"version": "1",
"default": "deny",
"tools": {
"listSheets": {}
}
}listSheets is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List tabs/sheets in a Google Spreadsheet. It is categorised as a Read tool in the Google Drive MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Google Drive MCP Server MCP server in PolicyLayer and add a rule for listSheets: 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 Drive MCP Server. Nothing to install.
listSheets is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the listSheets 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 listSheets. 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.
listSheets is provided by the Google Drive MCP Server MCP server (piotr-agier/google-drive-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 107 Google Drive MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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107 Google Drive MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.