updateAppCustomize | PolicyLayer

WHAT IT DOES

What updateAppCustomize does on kintone OAuth MCP Server on Cloudflare Workers

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

WHY IT NEEDS A POLICY

Why updateAppCustomize needs a policy

This tool creates or modifies customization settings reversibly. While it updates JavaScript/CSS code that affects app behavior, the operation is not destructive (changes can be reverted), not financial, and not code execution per se (it configures settings rather than executing arbitrary commands). The 'preview' designation suggests this may not be production-ready, but it still qualifies as Write.

From the tool's definition Tool description states 'Update JavaScript/CSS customization settings', which modifies app configuration. This is a write operation that changes application behavior through customization code.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

updateAppCustomize Rate-limited

updateAppCustomize 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": {
    "updateAppCustomize": {
      "limits": [
        {
          "counter": "updateappcustomize_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 kintone OAuth MCP Server on Cloudflare Workers, so you can run agents against it safely.

FAQ

Questions about updateAppCustomize

What does the updateAppCustomize tool do? +

Update JavaScript/CSS customization settings (preview). It is categorised as a Write tool in the kintone OAuth MCP Server on Cloudflare Workers MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on updateAppCustomize? +

Register the kintone OAuth MCP Server on Cloudflare Workers MCP server in PolicyLayer and add a rule for updateAppCustomize: 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 kintone OAuth MCP Server on Cloudflare Workers. Nothing to install.

What risk level is updateAppCustomize? +

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

Can I rate-limit updateAppCustomize? +

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

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

updateAppCustomize is provided by the kintone OAuth MCP Server on Cloudflare Workers MCP server (r3-yamauchi/kintone-oauth-mcp-server-cfw). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.