update_recipe · CoupleHub MCP Server MCP: Risk & Policy

WHAT IT DOES

What update_recipe does on CoupleHub MCP Server

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

WHY IT NEEDS A POLICY

Why update_recipe needs a policy

This tool creates or modifies data reversibly, which is the definition of Write category. While it modifies shared couple data (raising the severity above low), it does not delete data (not Destructive), execute arbitrary code (not Execute), or involve financial transactions (not Financial).

From the tool's definition Tool name 'update_recipe' and description 'Update an existing recipe' indicates modification of existing data. The phrase 'Only include fields that need changing' confirms partial/reversible updates rather than deletion.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_recipe Rate-limited

update_recipe 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_recipe": {
      "limits": [
        {
          "counter": "update_recipe_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 CoupleHub MCP Server, so you can run agents against it safely.

FAQ

Questions about update_recipe

What does the update_recipe tool do? +

Update an existing recipe. Only include fields that need changing. It is categorised as a Write tool in the CoupleHub 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 update_recipe? +

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

What risk level is update_recipe? +

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

Can I rate-limit update_recipe? +

Yes. Add a rate_limit block to the update_recipe 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_recipe completely? +

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

update_recipe is provided by the CoupleHub MCP Server MCP server (uczesieweba/couplehub-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.