AI agents call search_drive_files_tool to retrieve information from Apps Script MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Search and file discovery operations are non-destructive read actions. Even though the description is empty, the tool name clearly indicates a search functionality (retrieve/query pattern), which is characteristic of Read category tools. The severity is low because searching files has minimal blast radius—it returns metadata without side effects.
From the tool's definition Tool name 'search_drive_files_tool' indicates a search/query operation on Google Drive files. The name structure and context within an Apps Script MCP server that manages scripts and file operations suggests this retrieves or lists files without modifying…
Documented attack patterns abuse exactly the kind of access search_drive_files_tool gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Apps Script MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for search_drive_files_tool:
{
"version": "1",
"default": "deny",
"tools": {
"search_drive_files_tool": {}
}
} search_drive_files_tool is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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search_drive_files_tool. It is categorised as a Read tool in the Apps Script MCP MCP Server, which means it retrieves data without modifying state.
Register the Apps Script MCP server in PolicyLayer and add a rule for search_drive_files_tool: 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 Apps Script MCP. Nothing to install.
search_drive_files_tool 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 search_drive_files_tool 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 search_drive_files_tool. 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.
search_drive_files_tool is provided by the Apps Script MCP server (sam-ent/google-automation-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Apps Script MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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60 Apps Script MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.