cribl_setPipelineConfig · Cribl MCP: Risk & Policy

WHAT IT DOES

What cribl_setPipelineConfig does on Cribl

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

WHY IT NEEDS A POLICY

Why cribl_setPipelineConfig needs a policy

The tool creates or modifies pipeline configurations in Cribl, affecting system behavior and data processing rules. This is a Write operation (not Execute, as it doesn't directly run arbitrary code; not Destructive, as configurations can be reverted).

From the tool's definition 'Applies a new configuration payload to a specified pipeline' — this modifies pipeline configuration, which is a reversible write operation that changes system state.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

cribl_setPipelineConfig Rate-limited

cribl_setPipelineConfig 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": {
    "cribl_setPipelineConfig": {
      "limits": [
        {
          "counter": "cribl_setpipelineconfig_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 Cribl, so you can run agents against it safely.

FAQ

Questions about cribl_setPipelineConfig

What does the cribl_setPipelineConfig tool do? +

Applies a new configuration payload to a specified pipeline in a worker group. It is categorised as a Write tool in the Cribl MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on cribl_setPipelineConfig? +

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

What risk level is cribl_setPipelineConfig? +

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

Can I rate-limit cribl_setPipelineConfig? +

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

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

cribl_setPipelineConfig is provided by the Cribl MCP server (pebbletek/cribl-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.