start_timer · Timecamp MCP: Risk & Policy

WHAT IT DOES

What start_timer does on Timecamp

AI agents invoke start_timer to trigger actions in Timecamp. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why start_timer needs a policy

This tool executes a real-world side effect—initiating a time-tracking timer in TimeCamp—rather than simply reading or writing data. While the effect is reversible (a timer can be stopped), it is an Execute category action because it initiates an ongoing external process.

From the tool's definition Tool name 'start_timer' and description 'Start tracking time for a specific task' indicate an action that triggers an external operation (timer activation) whose effects depend on the task argument supplied.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

start_timer Rate-limited

start_timer stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "start_timer": {
      "limits": [
        {
          "counter": "start_timer_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about start_timer

What does the start_timer tool do? +

Start tracking time for a specific task. It is categorised as a Execute tool in the Timecamp MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on start_timer? +

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

What risk level is start_timer? +

start_timer is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit start_timer? +

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

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

start_timer is provided by the Timecamp MCP server (kkeeling/timecamp-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.