railway_create_service · Railway MCP Server MCP

WHAT IT DOES

What railway_create_service does on Railway MCP Server

AI agents use railway_create_service to create or update resources in Railway MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Railway MCP Server environment.

WHY IT NEEDS A POLICY

Why railway_create_service needs a policy

The tool creates new services within Railway infrastructure. This is a Write-category action because it creates resources that can be modified or deleted later (reversible). Severity is high because creating services in a production cloud infrastructure could incur costs, cause resource allocation issues, or enable unauthorized workloads, though the action itself is not irreversible (services can be deleted).

From the tool's definition Tool name 'railway_create_service' indicates creation of a new service. Sibling tools include 'railway_delete_service', 'railway_deploy', and 'railway_connect_service', confirming this server manages infrastructure lifecycle operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

railway_create_service Rate-limited

railway_create_service stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "railway_create_service": {
      "limits": [
        {
          "counter": "railway_create_service_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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

FAQ

Questions about railway_create_service

What does the railway_create_service tool do? +

railway_create_service. It is categorised as a Write tool in the Railway MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on railway_create_service? +

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

What risk level is railway_create_service? +

railway_create_service is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit railway_create_service? +

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

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

railway_create_service is provided by the Railway MCP Server MCP server (travis-gilbert/railway-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.