create_expense_category · Clockify Time Tracking MCP

WHAT IT DOES

What create_expense_category does on Clockify Time Tracking

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

WHY IT NEEDS A POLICY

Why create_expense_category needs a policy

Creating an expense category is a reversible modification operation that adds a new resource to the system's expense tracking structure. It does not execute arbitrary code, delete data, or move money. While it could affect financial workflows downstream, the tool itself only creates categorical metadata.

From the tool's definition Tool name 'create_expense_category' explicitly indicates creation of a new category resource. The verb 'create' is characteristic of Write operations that modify state reversibly. Empty description limits evidence but naming pattern is clear.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_expense_category Rate-limited

create_expense_category 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_expense_category": {
      "limits": [
        {
          "counter": "create_expense_category_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 Clockify Time Tracking, so you can run agents against it safely.

FAQ

Questions about create_expense_category

What does the create_expense_category tool do? +

create_expense_category. It is categorised as a Write tool in the Clockify Time Tracking 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_expense_category? +

Register the Clockify Time Tracking MCP server in PolicyLayer and add a rule for create_expense_category: 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 Clockify Time Tracking. Nothing to install.

What risk level is create_expense_category? +

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

Can I rate-limit create_expense_category? +

Yes. Add a rate_limit block to the create_expense_category 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_expense_category completely? +

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

create_expense_category is provided by the Clockify Time Tracking MCP server (pypi:clockify-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.