filter_rule_add · Media MCP: Risk & Policy

WHAT IT DOES

What filter_rule_add does on Media

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

WHY IT NEEDS A POLICY

Why filter_rule_add needs a policy

An AI agent can call filter_rule_add faster than any human can review — one bad instruction and it creates or modifies resources in Media by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

filter_rule_add Rate-limited

filter_rule_add 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": {
    "filter_rule_add": {
      "limits": [
        {
          "counter": "filter_rule_add_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, so you can run agents against it safely.

FAQ

Questions about filter_rule_add

What does the filter_rule_add tool do? +

Add a tweet filter rule for real-time keyword monitoring. Matches tweets containing specific terms. It is categorised as a Write tool in the Media MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on filter_rule_add? +

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

What risk level is filter_rule_add? +

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

Can I rate-limit filter_rule_add? +

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

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

filter_rule_add is provided by the Media MCP server (woosal1337/media-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.