update_log_parsing_rule · Newrelic MCP: Risk & Policy

WHAT IT DOES

What update_log_parsing_rule does on Newrelic

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

WHY IT NEEDS A POLICY

Why update_log_parsing_rule needs a policy

This tool creates or modifies log parsing configuration reversibly. While it changes system behavior by altering how logs are processed, the change is reversible (the rule can be updated again or reverted). This is a Write operation rather than Execute because it modifies configuration data rather than triggering immediate operational actions.

From the tool's definition Tool name is 'update_log_parsing_rule' and description states 'Update an existing log parsing rule', which modifies configuration data in New Relic

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_log_parsing_rule Rate-limited

update_log_parsing_rule 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_log_parsing_rule": {
      "limits": [
        {
          "counter": "update_log_parsing_rule_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 Newrelic, so you can run agents against it safely.

FAQ

Questions about update_log_parsing_rule

What does the update_log_parsing_rule tool do? +

Update an existing log parsing rule. It is categorised as a Write tool in the Newrelic 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_log_parsing_rule? +

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

What risk level is update_log_parsing_rule? +

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

Can I rate-limit update_log_parsing_rule? +

Yes. Add a rate_limit block to the update_log_parsing_rule 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_log_parsing_rule completely? +

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

update_log_parsing_rule is provided by the Newrelic MCP server (@piekstras/newrelic-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.