list_drive_files

SERVERHermoso SOURCEhttps://app.hermoso.ai/mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade D, identity unverified Pull the record →

This record as markdown: /tools/hermoso/list-drive-files.md

WHAT IT DOES

What list_drive_files does on Hermoso

AI agents call list_drive_files to retrieve information from Hermoso without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why list_drive_files is rated Low

Even though list_drive_files only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_drive_files safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Hermoso, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For list_drive_files, this is the rule to start with:

list_drive_files Allowed

list_drive_files is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_drive_files": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Hermoso, apply this rule, and every list_drive_files call is checked against it from then on.

FAQ

Questions about list_drive_files

What does the list_drive_files tool do? +

List the Google Drive files & folders Hermoso can reach — the ones it created, plus any the user handed over with the Google file picker in the app (the drive.file scope exposes nothing else, never their entire Drive). This is how you find the id of a file the user picked. Filter by query (name contains …), folderId (contents of a folder), or onlyFolders:true. Paginate with pageToken. Read-only. It is categorised as a Read tool in the Hermoso MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_drive_files? +

Register the Hermoso MCP server in PolicyLayer and add a rule for list_drive_files: 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 Hermoso. Nothing to install.

What risk level is list_drive_files? +

list_drive_files is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit list_drive_files? +

Yes. Add a rate_limit block to the list_drive_files 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.

How do I block list_drive_files completely? +

Set action: deny in the PolicyLayer policy for list_drive_files. 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.

What MCP server provides list_drive_files? +

list_drive_files is provided by the Hermoso MCP server (https://app.hermoso.ai/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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