gateway_reload_server · MCP Gateway MCP: Risk & Policy

WHAT IT DOES

What gateway_reload_server does on MCP Gateway

AI agents invoke gateway_reload_server to trigger actions in MCP Gateway. 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 gateway_reload_server needs a policy

This tool triggers an external operational cycle (disconnect then reconnect) on a backend server. It causes side effects by restarting a live service, which qualifies as Execute. While not destructive in the data sense, misuse could disrupt active connections or cause service interruptions, warranting medium severity.

From the tool's definition Disconnect and reconnect a backend MCP server to pick up code changes

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

gateway_reload_server Rate-limited

gateway_reload_server 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": {
    "gateway_reload_server": {
      "limits": [
        {
          "counter": "gateway_reload_server_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 MCP Gateway, so you can run agents against it safely.

FAQ

Questions about gateway_reload_server

What does the gateway_reload_server tool do? +

Disconnect and reconnect a backend MCP server to pick up code changes. It is categorised as a Execute tool in the MCP Gateway MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on gateway_reload_server? +

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

What risk level is gateway_reload_server? +

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

Can I rate-limit gateway_reload_server? +

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

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

gateway_reload_server is provided by the MCP Gateway MCP server (raiansar/mcp-gateway). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.