sync_translations · Langapi MCP: Risk & Policy

WHAT IT DOES

What sync_translations does on Langapi

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

WHY IT NEEDS A POLICY

Why sync_translations needs a policy

This tool performs reversible write operations: it creates new translation files and modifies existing translation content. While these are persistent changes to the project's i18n infrastructure, they can be undone (files can be deleted, translations can be corrected in subsequent syncs). It does not execute arbitrary code, delete data irreversibly, or move money.

From the tool's definition Tool description states it can "Add new languages" (creates locale files) and "SYNC existing translations" (modifies translation data). Key verbs: 'creates new locale files automatically' and 'sync existing translations'.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sync_translations Rate-limited

sync_translations 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": {
    "sync_translations": {
      "limits": [
        {
          "counter": "sync_translations_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 Langapi, so you can run agents against it safely.

FAQ

Questions about sync_translations

What does the sync_translations tool do? +

Add new languages or sync existing translations via LangAPI. Use this tool to: (1) ADD translations for new languages like Czech, Spanish, French - creates new locale files automatically, (2) SYNC existing translations when source content changes. Supports any valid language code (e.g.,. It is categorised as a Write tool in the Langapi MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on sync_translations? +

Register the Langapi MCP server in PolicyLayer and add a rule for sync_translations: 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 Langapi. Nothing to install.

What risk level is sync_translations? +

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

Can I rate-limit sync_translations? +

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

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

sync_translations is provided by the Langapi MCP server (tedyhub/langapi-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.