create_public_artifact_url

THE RISK

Medium Risk

Why create_public_artifact_url needs a policy

This tool creates a new artifact URL resource, which is a write operation—it adds or modifies data (a public reference). It is not destructive (the artifact itself is not deleted), not financial, and not directly executing code. Severity is medium because exposing artifacts publicly via AI agent misuse could leak sensitive build outputs, though the operation is reversible (the URL can be revoked).

From the tool's definition Tool name 'create_public_artifact_url' indicates creation of a resource (public URL). The Codemagic CI/CD context suggests this generates a shareable link to build artifacts, which is a reversible write operation that modifies accessibility/metadata of…

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

POLICY

How to control create_public_artifact_url

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

policy.json

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

create_public_artifact_url 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.

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

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about create_public_artifact_url

What does the create_public_artifact_url tool do? +

create_public_artifact_url. It is categorised as a Write tool in the Codemagic 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 create_public_artifact_url? +

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

What risk level is create_public_artifact_url? +

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

Can I rate-limit create_public_artifact_url? +

Yes. Add a rate_limit block to the create_public_artifact_url 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_public_artifact_url completely? +

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

create_public_artifact_url is provided by the Codemagic MCP Server MCP server (stefanoamorelli/codemagic-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Codemagic MCP Server tool call.

Start from Codemagic MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →