add_text_block · Media-Editor- MCP: Risk & Policy

WHAT IT DOES

What add_text_block does on Media-Editor-MCP

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

WHY IT NEEDS A POLICY

Why add_text_block needs a policy

The tool creates or modifies text content within a video editing project, which is reversible data modification. It falls under Write rather than Execute because it performs a bounded content-addition operation rather than running arbitrary code. Severity is medium because misuse could affect project integrity, but changes are reversible and scoped to text elements.

From the tool's definition Tool name 'add_text_block' combined with server context showing tools that modify video editing projects (add_animation, add_audio, add_captions, add_clip_effect, etc.). The 'add_' prefix indicates content creation/modification.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_text_block Rate-limited

add_text_block 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": {
    "add_text_block": {
      "limits": [
        {
          "counter": "add_text_block_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 Media-Editor-MCP, so you can run agents against it safely.

FAQ

Questions about add_text_block

What does the add_text_block tool do? +

add_text_block. It is categorised as a Write tool in the Media-Editor-MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_text_block? +

Register the Media-Editor- MCP server in PolicyLayer and add a rule for add_text_block: 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 Media-Editor-MCP. Nothing to install.

What risk level is add_text_block? +

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

Can I rate-limit add_text_block? +

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

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

add_text_block is provided by the Media-Editor- MCP server (nguyenph88/media-editor-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.