get_root_folders

THE RISK

Low Risk

Why get_root_folders needs a policy

This tool only queries and retrieves information about folder structure within a workspace. It performs no data creation, modification, deletion, or execution of external operations. The information returned (folder names, IDs, structure) is metadata that supports navigation and read operations. No side effects or state changes occur.

From the tool's definition Tool description states 'Lists all root folders' - a retrieval operation with no modification. The verb 'Lists' and action of retrieving 'names, IDs, and basic structure' indicate read-only access to folder metadata.

Risk signalsAdmin/system-level operation

Documented attack patterns abuse exactly the kind of access get_root_folders gives an agent:

POLICY

How to control get_root_folders

PolicyLayer is an MCP gateway — it sits between your AI agents and Carbon Voice, and nothing reaches the server without passing your rules. This is the rule we recommend for get_root_folders:

policy.json

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

get_root_folders is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Carbon Voice — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

Related tools and policies

More Carbon Voice tools

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_root_folders

What does the get_root_folders tool do? +

Lists all root folders for a given workspace, including their names, IDs, and basic structure,. It is categorised as a Read tool in the Carbon Voice MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_root_folders? +

Register the Carbon Voice MCP server in PolicyLayer and add a rule for get_root_folders: 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 Carbon Voice. Nothing to install.

What risk level is get_root_folders? +

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

Can I rate-limit get_root_folders? +

Yes. Add a rate_limit block to the get_root_folders 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 get_root_folders completely? +

Set action: deny in the PolicyLayer policy for get_root_folders. 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 get_root_folders? +

get_root_folders is provided by the Carbon Voice MCP server (phononx/cv-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Carbon Voice tool call.

Start from Carbon Voice, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →