update_top_item_position · Mcp Revelor MCP: Risk & Policy

WHAT IT DOES

What update_top_item_position does on Mcp Revelor

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

WHY IT NEEDS A POLICY

Why update_top_item_position needs a policy

This tool modifies the positioning/ordering of pinned items in the e-shop's search or recommendation system. While reversible (positions can be changed back), it is a write operation that alters e-shop behavior. It does not create new items (would be lighter Write), delete items (would be Destructive), or execute arbitrary code (would be Execute).

From the tool's definition Tool description states it 'Change[s] position of an already-pinned top item', which is a modification operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_top_item_position Rate-limited

update_top_item_position 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_top_item_position": {
      "limits": [
        {
          "counter": "update_top_item_position_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 Revelor, so you can run agents against it safely.

FAQ

Questions about update_top_item_position

What does the update_top_item_position tool do? +

Change position of an already-pinned top item (1=top, 10=lowest). Does NOT unpin — only reorders. It is categorised as a Write tool in the Mcp Revelor 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_top_item_position? +

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

What risk level is update_top_item_position? +

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

Can I rate-limit update_top_item_position? +

Yes. Add a rate_limit block to the update_top_item_position 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_top_item_position completely? +

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

update_top_item_position is provided by the Mcp Revelor MCP server (webotvurci-s-r-o/mcp-revelor). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.