delete_marker

THE RISK

Critical Risk

Why delete_marker needs a policy

This tool permanently removes markers from a Pro Tools audio editing session. While markers are metadata rather than audio data, their deletion is irreversible and could disrupt workflow, project organization, or destroy important temporal references within a production.

From the tool's definition Tool name 'delete_marker' and description 'Delete one or more markers by their numbers' explicitly performs irreversible deletion of markers from a Pro Tools session.

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

POLICY

How to control delete_marker

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

policy.json

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

delete_marker 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 Pro Tools 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 Pro Tools MCP Server tools

Destructive clear Clear (delete) the selected content on selected tracks within the timeline selection witho Destructive delete_all_markers Delete all markers/memory locations in the session Destructive cut Cut the selected content on selected tracks within the timeline selection. Use select_trac Execute play Start playback in Pro Tools Execute ptsl_command Execute a raw PTSL command with custom parameters. Use this for advanced operations not co Execute record Start recording in Pro Tools Execute stop Stop playback/recording in Pro Tools Execute toggle_play Toggle between play and stop

All 36 Pro Tools MCP Server tools →

Destructive tools on other servers

Android Forensics ADB MCP Server create_full_backup 0xarchive web3_revoke_key Frida Game Hacking MCP clear_scan cPanel MCP Server clear_spam_box

Go deeper

Critical-risk tools in Pro Tools 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 delete_marker

What does the delete_marker tool do? +

Delete one or more markers by their numbers. It is categorised as a Destructive tool in the Pro Tools 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 delete_marker? +

Register the Pro Tools MCP Server MCP server in PolicyLayer and add a rule for delete_marker: 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 Pro Tools MCP Server. Nothing to install.

What risk level is delete_marker? +

delete_marker 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 delete_marker? +

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

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

delete_marker is provided by the Pro Tools MCP Server MCP server (skrul/protools-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 Pro Tools MCP Server tool call.

Start from Pro Tools 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 →