rybbit_update_goal · Rybbit MCP: Risk & Policy

WHAT IT DOES

What rybbit_update_goal does on Rybbit

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

WHY IT NEEDS A POLICY

Why rybbit_update_goal needs a policy

The tool modifies an existing analytics goal, which is a write operation that creates or changes data reversibly. It is not destructive (the goal is not deleted), does not execute arbitrary code or scripts, and does not involve financial transactions.

From the tool's definition Tool name 'rybbit_update_goal' and description 'Update an existing goal' indicate modification of existing data in Rybbit Analytics. This is a reversible change operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

rybbit_update_goal Rate-limited

rybbit_update_goal 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": {
    "rybbit_update_goal": {
      "limits": [
        {
          "counter": "rybbit_update_goal_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 Rybbit, so you can run agents against it safely.

FAQ

Questions about rybbit_update_goal

What does the rybbit_update_goal tool do? +

Update an existing goal. It is categorised as a Write tool in the Rybbit MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on rybbit_update_goal? +

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

What risk level is rybbit_update_goal? +

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

Can I rate-limit rybbit_update_goal? +

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

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

rybbit_update_goal is provided by the Rybbit MCP server (nks-hub/rybbit-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.