Compute profitability metrics for a date range. Supports three modes: time_based (hours * rates), invoice_based (actual invoices vs costs), and hybrid (invoices where available, time-based otherwise). Can group by client, project, user, task, date, week, or month.
AI agents call harvest_compute_profitability to retrieve information from Harvest MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and analyzes existing time entry and invoice data to calculate profitability—a read-only operation. It performs calculations on Harvest data (hours, rates, invoices, costs) but does not create, modify, delete, or move money.
From the tool's definition Tool description states it 'Compute[s] profitability metrics' with support for aggregating and grouping data by various dimensions. The verb 'compute' and 'analyze' (from server description) indicate data retrieval and calculation without modification.
Documented attack patterns abuse exactly the kind of access harvest_compute_profitability gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Harvest MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for harvest_compute_profitability:
{
"version": "1",
"default": "deny",
"tools": {
"harvest_compute_profitability": {}
}
}harvest_compute_profitability is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Compute profitability metrics for a date range. Supports three modes: time_based (hours * rates), invoice_based (actual invoices vs costs), and hybrid (invoices where available, time-based otherwise). Can group by client, project, user, task, date, week, or month. It is categorised as a Read tool in the Harvest MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Harvest MCP Server MCP server in PolicyLayer and add a rule for harvest_compute_profitability: 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 Harvest MCP Server. Nothing to install.
harvest_compute_profitability is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the harvest_compute_profitability 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.
Set action: deny in the PolicyLayer policy for harvest_compute_profitability. 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.
harvest_compute_profitability is provided by the Harvest MCP Server MCP server (southleft/harvest-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Harvest MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
21 Harvest MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.