update_mealplan · Mcp Mealie MCP: Risk & Policy

WHAT IT DOES

What update_mealplan does on Mcp Mealie

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

WHY IT NEEDS A POLICY

Why update_mealplan needs a policy

This tool modifies meal-plan data reversibly. It does not delete data (ruling out Destructive), does not execute arbitrary code or external operations (ruling out Execute), and does not involve financial transactions (ruling out Financial). The operation can be undone via subsequent updates, placing it squarely in the Write category.

From the tool's definition Tool description states 'Patch a meal-plan entry', which is an update/modification operation. The 'Patch' HTTP method and 'Only non-empty fields are sent' language indicate reversible modification of existing data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_mealplan Rate-limited

update_mealplan 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": {
    "update_mealplan": {
      "limits": [
        {
          "counter": "update_mealplan_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 Mcp Mealie, so you can run agents against it safely.

FAQ

Questions about update_mealplan

What does the update_mealplan tool do? +

Patch a meal-plan entry. Only non-empty fields are sent. It is categorised as a Write tool in the Mcp Mealie MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update_mealplan? +

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

What risk level is update_mealplan? +

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

Can I rate-limit update_mealplan? +

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

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

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