update_alert · My Portfolio MCP Server MCP: Risk & Policy

WHAT IT DOES

What update_alert does on My Portfolio MCP Server

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

WHY IT NEEDS A POLICY

Why update_alert needs a policy

This tool creates or modifies alert data in a reversible manner, fitting the Write category. The severity is medium because modifying alerts could affect an investor's notification preferences and decision-making (e.g., changing alert thresholds, conditions, or status), but the impact is localized to alert configuration rather than core financial transactions or irreversible deletions.

From the tool's definition Tool name 'update_alert' and description 'Update an alert' indicate modification of existing alert data. The verb 'update' is a write operation that changes alert properties reversibly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_alert Rate-limited

update_alert 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_alert": {
      "limits": [
        {
          "counter": "update_alert_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 My Portfolio MCP Server, so you can run agents against it safely.

FAQ

Questions about update_alert

What does the update_alert tool do? +

Update an alert. It is categorised as a Write tool in the My Portfolio 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_alert? +

Register the My Portfolio MCP Server MCP server in PolicyLayer and add a rule for update_alert: 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 My Portfolio MCP Server. Nothing to install.

What risk level is update_alert? +

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

Can I rate-limit update_alert? +

Yes. Add a rate_limit block to the update_alert 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_alert completely? +

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

update_alert is provided by the My Portfolio MCP Server MCP server (udaybhasker-ub/my-portfolio-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.