packing_list · Personal Brain MCP: Risk & Policy

WHAT IT DOES

What packing_list does on Personal Brain

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

WHY IT NEEDS A POLICY

Why packing_list needs a policy

The tool has dual functionality: reading (get a saved packing template) and writing (save a new one). Per the rules, the most severe applicable category wins, making this Write. The blast radius is low since packing list data is non-sensitive personal planning information with no financial, destructive, or executable implications.

From the tool's definition 'or save a new one' indicates this tool can create/modify stored packing templates in addition to reading them

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

packing_list Rate-limited

packing_list 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": {
    "packing_list": {
      "limits": [
        {
          "counter": "packing_list_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 Personal Brain, so you can run agents against it safely.

FAQ

Questions about packing_list

What does the packing_list tool do? +

Get a saved packing template by name or trip_type, or save a new one. Use before a trip to print a checklist. It is categorised as a Write tool in the Personal Brain MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on packing_list? +

Register the Personal Brain MCP server in PolicyLayer and add a rule for packing_list: 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 Personal Brain. Nothing to install.

What risk level is packing_list? +

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

Can I rate-limit packing_list? +

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

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

packing_list is provided by the Personal Brain MCP server (phantomts/personal-brain-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.