mark_news_as_read

THE RISK

Medium Risk

Why mark_news_as_read needs a policy

This tool creates or modifies data (marking articles as read) in a reversible manner. The action can be undone by marking articles as unread. The impact is limited to metadata state changes within a school portal system with no destructive, financial, or code-execution implications.

From the tool's definition Tool name 'mark_news_as_read' and description 'Mark news articles as read' indicate a modification operation that updates the read status of news items.

Documented attack patterns abuse exactly the kind of access mark_news_as_read gives an agent:

POLICY

How to control mark_news_as_read

PolicyLayer is an MCP gateway — it sits between your AI agents and N Lobby MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for mark_news_as_read:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "mark_news_as_read": {
      "limits": [
        {
          "counter": "mark_news_as_read_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

mark_news_as_read 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.

Create a free account and register N Lobby MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
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FAQ

Questions about mark_news_as_read

What does the mark_news_as_read tool do? +

Mark news articles as read. It is categorised as a Write tool in the N Lobby 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 mark_news_as_read? +

Register the N Lobby MCP Server MCP server in PolicyLayer and add a rule for mark_news_as_read: 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 N Lobby MCP Server. Nothing to install.

What risk level is mark_news_as_read? +

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

Can I rate-limit mark_news_as_read? +

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

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

mark_news_as_read is provided by the N Lobby MCP Server MCP server (minagishl/nlobby-cli). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every N Lobby MCP Server tool call.

Start from N Lobby MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →