Low Risk

calculate_dcf

Calculate Discounted Cash Flow valuation with sensitivity analysis and reverse DCF. Returns fair value per share, margin of safety, projected FCFs, and a WACC vs terminal growth sensitivity matrix.

Part of the Deepviews server.

calculate_dcf is read-only, but an agent in a loop can still rack up calls and cost. PolicyLayer caps every call before it runs. Live in minutes.

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AI agents call calculate_dcf to retrieve information from Deepviews 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 calculate_dcf 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.

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "calculate_dcf": {}
  }
}

See the full Deepviews policy for all 7 tools.

Get this rule live on your own Deepviews server in minutes. PolicyLayer enforces it on every call, before it runs.

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These attack patterns abuse exactly the kind of access calculate_dcf gives an agent. Each links to the full case and the policy that stops it:

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Every attack above starts with a tool call. PolicyLayer checks each one against your policy first, so calculate_dcf only ever does what you allow.

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Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.

What does the calculate_dcf tool do? +

Calculate Discounted Cash Flow valuation with sensitivity analysis and reverse DCF. Returns fair value per share, margin of safety, projected FCFs, and a WACC vs terminal growth sensitivity matrix.. It is categorised as a Read tool in the Deepviews MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on calculate_dcf? +

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

What risk level is calculate_dcf? +

calculate_dcf is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit calculate_dcf? +

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

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

calculate_dcf is provided by the Deepviews MCP server (deepviews-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Deepviews tool call.

Deterministic rules across all 7 Deepviews tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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