add_user_favorite · Mealie MCP Server MCP: Risk & Policy

WHAT IT DOES

What add_user_favorite does on Mealie MCP Server

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

WHY IT NEEDS A POLICY

Why add_user_favorite needs a policy

This tool creates a new favorite association between a user and a recipe. It is a reversible write operation (the favorite can be removed) with no destructive elements, no code execution, and no financial implications. The blast radius is limited to a single user's preference data, making it low severity.

From the tool's definition Tool name 'add_user_favorite' and description 'Add one recipe to a user's favorites' indicate a create/add operation that modifies user preferences data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_user_favorite Rate-limited

add_user_favorite 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_user_favorite": {
      "limits": [
        {
          "counter": "add_user_favorite_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 Mealie MCP Server, so you can run agents against it safely.

FAQ

Questions about add_user_favorite

What does the add_user_favorite tool do? +

Add one recipe to a user's favorites. It is categorised as a Write tool in the Mealie 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 add_user_favorite? +

Register the Mealie MCP Server MCP server in PolicyLayer and add a rule for add_user_favorite: 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 Mealie MCP Server. Nothing to install.

What risk level is add_user_favorite? +

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

Can I rate-limit add_user_favorite? +

Yes. Add a rate_limit block to the add_user_favorite 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_user_favorite completely? +

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

add_user_favorite is provided by the Mealie MCP Server MCP server (nikopol666/mealie-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.