fl_clear_piano_roll

THE RISK

Critical Risk

Why fl_clear_piano_roll needs a policy

This tool permanently removes all notes from the piano roll without the ability to undo via the API. While FL Studio itself likely has undo functionality, the tool itself performs a destructive operation that cannot be reversed through the MCP interface. The loss of musical composition data represents a high-severity action if triggered unintentionally by an AI agent.

From the tool's definition Tool name 'fl_clear_piano_roll' combined with description 'Clear all notes from the FL Studio piano roll' indicates irreversible deletion of musical data from the piano roll.

Risk signalsBulk/mass operation — affects multiple targets

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

POLICY

How to control fl_clear_piano_roll

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

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "fl_clear_piano_roll"
  ]
}

fl_clear_piano_roll disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

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

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More FL Studio MCP Server tools

Destructive fl_clear_request_queue Clear any pending note requests without executing them. Destructive fl_delete_notes fl_delete_notes Execute fl_play Start or pause FL Studio playback. Execute fl_stop Stop FL Studio playback completely. Execute fl_trigger_note fl_trigger_note Execute fl_trigger_script Manually trigger FL Studio to process pending note requests. Execute fl_record Toggle recording mode in FL Studio. Write fl_arm_track Toggle the recording arm state of a mixer track.

All 57 FL Studio MCP Server tools →

Destructive tools on other servers

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Go deeper

Critical-risk tools in FL Studio MCP Server → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about fl_clear_piano_roll

What does the fl_clear_piano_roll tool do? +

Clear all notes from the FL Studio piano roll. It is categorised as a Destructive tool in the FL Studio MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on fl_clear_piano_roll? +

Register the FL Studio MCP Server MCP server in PolicyLayer and add a rule for fl_clear_piano_roll: 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 FL Studio MCP Server. Nothing to install.

What risk level is fl_clear_piano_roll? +

fl_clear_piano_roll is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit fl_clear_piano_roll? +

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

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

fl_clear_piano_roll is provided by the FL Studio MCP Server MCP server (karl-andres/fl-studio-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every FL Studio MCP Server tool call.

Start from FL Studio MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →