Net present value of a cash flow series at a given discount rate. Use when computing net present value of a series of cash flows. Provide discount rate and an array of cash flows (first is typically negative for initial investment). Returns: NPV, profitability index, and discounted cash flow brea...
Part of the Quantoracle server.
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AI agents call tvm_npv to retrieve information from Quantoracle without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though tvm_npv only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"tvm_npv": {}
}
}See the full Quantoracle policy for all 74 tools.
These attack patterns abuse exactly the kind of access tvm_npv gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Net present value of a cash flow series at a given discount rate. Use when computing net present value of a series of cash flows. Provide discount rate and an array of cash flows (first is typically negative for initial investment). Returns: NPV, profitability index, and discounted cash flow breakdown.. It is categorised as a Read tool in the Quantoracle MCP Server, which means it retrieves data without modifying state.
Register the Quantoracle MCP server in PolicyLayer and add a rule for tvm_npv: 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 Quantoracle. Nothing to install.
tvm_npv 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 tvm_npv 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 tvm_npv. 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.
tvm_npv is provided by the Quantoracle MCP server (QuantOracle/quantoracle). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 74 Quantoracle tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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