save_item · Reddirect MCP: Risk & Policy

WHAT IT DOES

What save_item does on Reddirect

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

WHY IT NEEDS A POLICY

Why save_item needs a policy

The save_item tool creates a new entry in a user's saved items collection. This is a reversible modification operation (items can be unsaved), making it a Write action rather than Read (which would only retrieve data). It lacks the destructive, financial, or execute characteristics of higher-severity categories.

From the tool's definition Tool description states 'Save a Reddit post or comment to your saved items list.' This modifies user data (saved items) reversibly without deletion or financial impact.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

save_item Rate-limited

save_item 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": {
    "save_item": {
      "limits": [
        {
          "counter": "save_item_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 Reddirect, so you can run agents against it safely.

FAQ

Questions about save_item

What does the save_item tool do? +

Save a Reddit post or comment to your saved items list. It is categorised as a Write tool in the Reddirect MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on save_item? +

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

What risk level is save_item? +

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

Can I rate-limit save_item? +

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

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

save_item is provided by the Reddirect MCP server (jeebus87/reddirect). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.