breakpoint_set · Rr MCP: Risk & Policy

WHAT IT DOES

What breakpoint_set does on Rr

AI agents invoke breakpoint_set to trigger actions in Rr. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why breakpoint_set needs a policy

Setting a breakpoint modifies the state of a debugging session by registering a trigger that pauses execution at a specified location. This is an active operation that affects program execution flow within the rr debugging environment. It's not purely read-only, and while reversible (breakpoints can be deleted), its primary function is to control/interrupt execution, placing it in the Execute category.

From the tool's definition Set a breakpoint to pause execution at a specific

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

breakpoint_set Rate-limited

breakpoint_set stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "breakpoint_set": {
      "limits": [
        {
          "counter": "breakpoint_set_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Rr, so you can run agents against it safely.

FAQ

Questions about breakpoint_set

What does the breakpoint_set tool do? +

Set a breakpoint to pause execution at a specific. It is categorised as a Execute tool in the Rr MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on breakpoint_set? +

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

What risk level is breakpoint_set? +

breakpoint_set is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit breakpoint_set? +

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

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

breakpoint_set is provided by the Rr MCP server (jnjaeschke/rr-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.