remove_breakpoint

THE RISK

Medium Risk

Why remove_breakpoint needs a policy

Removing a breakpoint modifies the debugging state of a browser session by deleting a previously set breakpoint. This is a reversible action (the breakpoint can be re-added), so it falls under Write rather than Destructive. The blast radius is low as it only affects debugging configuration, not data or system state.

From the tool's definition Remove a previously set JavaScript breakpoint by its CDP breakpoint ID

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

POLICY

How to control remove_breakpoint

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "remove_breakpoint": {
      "limits": [
        {
          "counter": "remove_breakpoint_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

remove_breakpoint stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

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

LIMIT THIS TOOL →

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EXPLORE

Related tools and policies

More ReverseCraft DevTools MCP tools

Destructive clear_cookies Clear browser cookies for all sites or a specific domain. Destructive clear_persistent_scripts Remove all registered persistent scripts for the current page at once. This is useful for Destructive clear_script_replacements Remove all script replacement rules for the current page. Destructive remove_persistent_script Remove a previously registered persistent script by its identifier. After removal, the sc Destructive remove_script_replacement Remove a script replacement rule by its ID. Destructive remove_xhr_breakpoint Remove a previously set XHR/Fetch breakpoint by its URL pattern, or remove all XHR breakpo Destructive close_page Closes the page by its index. The last open page cannot be closed. Execute navigate_page Navigates the currently selected page to a URL.

All 46 ReverseCraft DevTools MCP tools →

Write tools on other servers

M-Team MCP Server download_torrent YouTube MCP Server generate_video_title Android Forensics ADB MCP Server combine_reports 0xarchive web3_signup

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about remove_breakpoint

What does the remove_breakpoint tool do? +

Remove a previously set JavaScript breakpoint by its CDP breakpoint ID. It is categorised as a Write tool in the ReverseCraft DevTools MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on remove_breakpoint? +

Register the ReverseCraft DevTools MCP server in PolicyLayer and add a rule for remove_breakpoint: 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 ReverseCraft DevTools MCP. Nothing to install.

What risk level is remove_breakpoint? +

remove_breakpoint is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit remove_breakpoint? +

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

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

remove_breakpoint is provided by the ReverseCraft DevTools MCP server (reverse-craft/rc-devtools-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every ReverseCraft DevTools MCP tool call.

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

CHECK YOUR STACK →