update_stock_report · Stocks MCP: Risk & Policy

WHAT IT DOES

What update_stock_report does on StocksMCP

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

WHY IT NEEDS A POLICY

Why update_stock_report needs a policy

This tool modifies existing stock report data in a reversible manner. Updates can be undone by restoring previous versions or re-saving with original content. It does not delete data (which would be Destructive), execute arbitrary code (Execute), move money (Financial), or merely retrieve information (Read).

From the tool's definition Tool description states 'Update specific fields or sections of an existing saved stock report on disk.' The verb 'update' and the phrase 'modify...reversibly' align with Write category operations that create or modify data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_stock_report Rate-limited

update_stock_report 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_stock_report": {
      "limits": [
        {
          "counter": "update_stock_report_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 StocksMCP, so you can run agents against it safely.

FAQ

Questions about update_stock_report

What does the update_stock_report tool do? +

Update specific fields or sections of an existing saved stock report on disk. It is categorised as a Write tool in the StocksMCP 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_stock_report? +

Register the Stocks MCP server in PolicyLayer and add a rule for update_stock_report: 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 StocksMCP. Nothing to install.

What risk level is update_stock_report? +

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

Can I rate-limit update_stock_report? +

Yes. Add a rate_limit block to the update_stock_report 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_stock_report completely? +

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

update_stock_report is provided by the Stocks MCP server (pawanthanay/stocksmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.