upsert_theme_files · Kockatoos Shopify MCP Server MCP

WHAT IT DOES

What upsert_theme_files does on Kockatoos Shopify MCP Server

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

WHY IT NEEDS A POLICY

Why upsert_theme_files needs a policy

This tool modifies theme files which are critical to store presentation and functionality, but changes are reversible (can be updated/reverted). It does not delete data (would be Destructive) or execute arbitrary code (would be Execute), nor does it move money (Financial).

From the tool's definition Tool description states it will 'Create or update theme files' and requires 'write_themes access scope'. The upsert pattern indicates reversible modification of theme assets.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

upsert_theme_files Rate-limited

upsert_theme_files 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": {
    "upsert_theme_files": {
      "limits": [
        {
          "counter": "upsert_theme_files_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about upsert_theme_files

What does the upsert_theme_files tool do? +

Create or update theme files (up to 50 per request). Provide file content as text or base64. Requires write_themes access scope. It is categorised as a Write tool in the Kockatoos Shopify 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 upsert_theme_files? +

Register the Kockatoos Shopify MCP Server MCP server in PolicyLayer and add a rule for upsert_theme_files: 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 Kockatoos Shopify MCP Server. Nothing to install.

What risk level is upsert_theme_files? +

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

Can I rate-limit upsert_theme_files? +

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

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

upsert_theme_files is provided by the Kockatoos Shopify MCP Server MCP server (untitled-developers/shopify-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.