create_fee · Smokeball MCP: Risk & Policy

WHAT IT DOES

What create_fee does on Smokeball

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

WHY IT NEEDS A POLICY

Why create_fee needs a policy

This tool creates a new fee/time entry record in the law firm's billing system. It writes new data (a billable time entry) but is reversible in principle — the entry can typically be deleted or edited. It does not directly move money or execute code, making Write the appropriate category. Severity is medium because incorrect time entries could affect billing accuracy and client invoices.

From the tool's definition Create a fee (time entry). date: YYYY-MM-DD. duration_minutes: time spent.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_fee Rate-limited

create_fee 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": {
    "create_fee": {
      "limits": [
        {
          "counter": "create_fee_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Smokeball, so you can run agents against it safely.

FAQ

Questions about create_fee

What does the create_fee tool do? +

Create a fee (time entry). date: YYYY-MM-DD. duration_minutes: time spent. It is categorised as a Write tool in the Smokeball MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_fee? +

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

What risk level is create_fee? +

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

Can I rate-limit create_fee? +

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

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

create_fee is provided by the Smokeball MCP server (rosenadvertising/smokeball-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.