nexti · WineDbg MCP Server MCP: Risk & Policy

WHAT IT DOES

What nexti does on WineDbg MCP Server

AI agents invoke nexti to trigger actions in WineDbg MCP Server. 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 nexti needs a policy

This tool advances execution of the debugged process by one instruction, which is a debugger 'step over' operation. It causes code to execute in the target process, placing it in the Execute category. The blast radius is medium since misuse could cause the target application to advance past a breakpoint or execute unintended code paths, but it is constrained to the debugging session.

From the tool's definition Next instruction — steps the debugger to the next machine instruction, executing code in the target process.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

nexti Rate-limited

nexti 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": {
    "nexti": {
      "limits": [
        {
          "counter": "nexti_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 WineDbg MCP Server, so you can run agents against it safely.

FAQ

Questions about nexti

What does the nexti tool do? +

Next instruction. It is categorised as a Execute tool in the WineDbg MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on nexti? +

Register the WineDbg MCP Server MCP server in PolicyLayer and add a rule for nexti: 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 WineDbg MCP Server. Nothing to install.

What risk level is nexti? +

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

Can I rate-limit nexti? +

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

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

nexti is provided by the WineDbg MCP Server MCP server (maci0/mcp-winedbg). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.