calculate
Run the 409A valuation budget calculator calculator: 409A valuations to budget for; Appraisal fees at your quoted price; Expedite premium; Total 409A spend over the horizon. Missing inputs fall back to their documented defaults.
This record as markdown: /tools/com-409acost-site/calculate.md
What calculate does on Site
AI agents invoke calculate to trigger actions in Site. 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.
| Parameter | Type | Required | Description |
|---|---|---|---|
rush | number | — | Rush or expedite premium you have been quoted |
price | number | — | Quoted price per 409A valuation |
years | number | — | Planning horizon (years) |
events | number | — | Priced rounds or other material events expected in that time |
Parameters from the server's own tool schema.
Why calculate is rated High
calculate triggers real processes with real consequences. An agent gone sideways doesn't fire it once. It starts dozens of builds, sends mass notifications, or burns through compute before anyone looks up.
Attacks that exploit this kind of access
The rule that runs calculate safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Site, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For calculate, this is the rule to start with:
calculate 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Site, apply this rule, and every calculate call is checked against it from then on.
Questions about calculate
Run the 409A valuation budget calculator calculator: 409A valuations to budget for; Appraisal fees at your quoted price; Expedite premium; Total 409A spend over the horizon. Missing inputs fall back to their documented defaults. It is categorised as a Execute tool in the Site MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
calculate accepts 4 parameters: rush, price, years, events. The full parameter table on this page comes from the server's own tool schema.
Register the Site MCP server in PolicyLayer and add a rule for calculate: 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 Site. Nothing to install.
calculate is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the calculate 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 calculate. 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.
calculate is provided by the Site MCP server (https://409acost.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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