mcp_restart

Restart the MCP server to apply code changes

SERVERClaude C2 SOURCE0xyg3n/claude-c2

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/0xyg3n-claude-c2/mcp-restart.md

WHAT IT DOES

What mcp_restart does on Claude C2

AI agents invoke mcp_restart to trigger actions in Claude C2. 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.

RISK

Why mcp_restart is rated High

This tool executes a restart command on the MCP server, which is an external operation whose effects (service interruption, applying changes, potential side effects during restart) depend on system state. While not destructive in the permanent data-loss sense, it performs a non-reversible state change (service restart) that could disrupt operations.

From the tool's definition Tool name 'mcp_restart' and description 'Restart the MCP server to apply code changes' indicate execution of a system restart operation that triggers external server behavior.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs mcp_restart safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Claude C2, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For mcp_restart, this is the rule to start with:

mcp_restart Rate-limited

mcp_restart 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": {
    "mcp_restart": {
      "limits": [
        {
          "counter": "mcp_restart_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Claude C2, apply this rule, and every mcp_restart call is checked against it from then on.

FAQ

Questions about mcp_restart

What does the mcp_restart tool do? +

Restart the MCP server to apply code changes. It is categorised as a Execute tool in the Claude C2 MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on mcp_restart? +

Register the Claude C2 MCP server in PolicyLayer and add a rule for mcp_restart: 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 Claude C2. Nothing to install.

What risk level is mcp_restart? +

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

Can I rate-limit mcp_restart? +

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

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

mcp_restart is provided by the Claude C2 MCP server (0xyg3n/claude-c2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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