add_new · FlixBridge MCP: Risk & Policy

WHAT IT DOES

What add_new does on FlixBridge

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

WHY IT NEEDS A POLICY

Why add_new needs a policy

The tool creates or adds new entries to a media library, which is a reversible write operation. It does not execute arbitrary code (Execute), delete data (Destructive), or move funds (Financial).

From the tool's definition Tool name 'add_new' with description 'Add new media to library' indicates creation/addition of records to a media collection. This is a write operation that modifies library state.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_new Rate-limited

add_new 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_new": {
      "limits": [
        {
          "counter": "add_new_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 FlixBridge, so you can run agents against it safely.

FAQ

Questions about add_new

What does the add_new tool do? +

Add new media to library. It is categorised as a Write tool in the FlixBridge 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_new? +

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

What risk level is add_new? +

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

Can I rate-limit add_new? +

Yes. Add a rate_limit block to the add_new 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_new completely? +

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

add_new is provided by the FlixBridge MCP server (thesammykins/flixbridge). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.