create_deployment · Replit MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_deployment does on Replit MCP Server

AI agents invoke create_deployment to trigger actions in Replit 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 create_deployment needs a policy

Deploying/publishing a repl triggers an external operation that runs the repl's code on Replit's infrastructure and makes it publicly accessible. This is an Execute-category action as it initiates a live deployment process with real-world effects (serving traffic, consuming compute resources). It spans Write but the act of publishing/running code in production makes Execute the most appropriate category.

From the tool's definition Deploy/publish a repl

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_deployment Rate-limited

create_deployment 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": {
    "create_deployment": {
      "limits": [
        {
          "counter": "create_deployment_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 Replit MCP Server, so you can run agents against it safely.

FAQ

Questions about create_deployment

What does the create_deployment tool do? +

Deploy/publish a repl. It is categorised as a Execute tool in the Replit 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 create_deployment? +

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

What risk level is create_deployment? +

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

Can I rate-limit create_deployment? +

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

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

create_deployment is provided by the Replit MCP Server MCP server (nova-3951/replit-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.