generate_subtitles · Edge-TTS MCP Server MCP: Risk & Policy

WHAT IT DOES

What generate_subtitles does on Edge-TTS MCP Server

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

WHY IT NEEDS A POLICY

Why generate_subtitles needs a policy

The tool creates subtitle files as output, which is a reversible write operation. It does not execute arbitrary code, delete data, or cause financial impact. The low severity reflects that subtitle generation has minimal blast radius—the worst outcome is creation of unwanted subtitle files that can be deleted.

From the tool's definition Tool named 'generate_subtitles' on a text-to-speech server; sibling tools include 'save_audio' and 'text_to_speech', indicating this tool creates new subtitle files (write operation). Description is empty, limiting specificity.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_subtitles Rate-limited

generate_subtitles 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": {
    "generate_subtitles": {
      "limits": [
        {
          "counter": "generate_subtitles_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 Edge-TTS MCP Server, so you can run agents against it safely.

FAQ

Questions about generate_subtitles

What does the generate_subtitles tool do? +

generate_subtitles. It is categorised as a Write tool in the Edge-TTS 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 generate_subtitles? +

Register the Edge-TTS MCP Server MCP server in PolicyLayer and add a rule for generate_subtitles: 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 Edge-TTS MCP Server. Nothing to install.

What risk level is generate_subtitles? +

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

Can I rate-limit generate_subtitles? +

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

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

generate_subtitles is provided by the Edge-TTS MCP Server MCP server (yangwuan55/edge-tts-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.