Get MUR exchange rates from Bank of Mauritius. Costs $0.001 USDC via x402.
Part of the SENTINEL Compliance Intelligence server.
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AI agents call forex_rates to retrieve information from SENTINEL Compliance Intelligence 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 forex_rates 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": {
"forex_rates": {}
}
}See the full SENTINEL Compliance Intelligence policy for all 22 tools.
These attack patterns abuse exactly the kind of access forex_rates 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.
Get MUR exchange rates from Bank of Mauritius. Costs $0.001 USDC via x402.. It is categorised as a Read tool in the SENTINEL Compliance Intelligence MCP Server, which means it retrieves data without modifying state.
Register the SENTINEL Compliance Intelligence MCP server in PolicyLayer and add a rule for forex_rates: 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 SENTINEL Compliance Intelligence. Nothing to install.
forex_rates 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 forex_rates 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 forex_rates. 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.
forex_rates is provided by the SENTINEL Compliance Intelligence MCP server (https://mru-oracle.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 22 SENTINEL Compliance Intelligence tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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