device_reconnect

THE RISK

High Risk

Why device_reconnect needs a policy

This tool triggers an external hardware operation — re-establishing a connection to a DMA/FPGA device. It doesn't read, write, or destroy data directly, but it executes a device-level action that re-enables direct memory access hardware. Misuse could restore dangerous DMA capabilities unexpectedly, but the immediate action is establishing a connection rather than destroying or modifying data.

From the tool's definition Reconnect to the DMA/FPGA device after a previous device_disconnect

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

POLICY

How to control device_reconnect

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

policy.json

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

device_reconnect 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.

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

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Nevercheese Pcileech Memprocfs tools

Execute benchmark Measure DMA read/write throughput in MB/s. Use this to verify the FPGA device Execute fpga_config Read or write the FPGA Execute memory_write Write bytes to the target system Execute signature_resolve Find a byte pattern and resolve the operand to a target address — all in one step. Execute tlp_send Send and/or receive raw PCIe Transaction Layer Packets (TLPs). FPGA devices only. Write memory_patch NOT YET IMPLEMENTED. Signature-based patching (.sig files) is a pcileech CLI feature Read aob_scan Array-of-bytes pattern scan with ?? wildcard support in a process Read device_status Check the current DMA/FPGA device connection status.

All 37 Nevercheese Pcileech Memprocfs tools →

Execute tools on other servers

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Go deeper

High-risk tools in Nevercheese Pcileech Memprocfs → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-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.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about device_reconnect

What does the device_reconnect tool do? +

Reconnect to the DMA/FPGA device after a previous device_disconnect. It is categorised as a Execute tool in the Nevercheese Pcileech Memprocfs MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on device_reconnect? +

Register the Nevercheese Pcileech Memprocfs MCP server in PolicyLayer and add a rule for device_reconnect: 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 Nevercheese Pcileech Memprocfs. Nothing to install.

What risk level is device_reconnect? +

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

Can I rate-limit device_reconnect? +

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

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

device_reconnect is provided by the Nevercheese Pcileech Memprocfs MCP server (neverdecel/nevercheese-pcileech-memprocfs-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Nevercheese Pcileech Memprocfs tool call.

Start from Nevercheese Pcileech Memprocfs, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →