Same payload as forex, but packaged with MCP Apps chart metadata so compatible clients render an interactive spot-rate chart inline. Use this when the user asks to plot or visualize a currency pair.
Part of the FXMacroData server.
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AI agents call forex_visual_artifact to retrieve information from FXMacroData 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_visual_artifact 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_visual_artifact": {}
}
}See the full FXMacroData policy for all 15 tools.
These attack patterns abuse exactly the kind of access forex_visual_artifact 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.
Same payload as forex, but packaged with MCP Apps chart metadata so compatible clients render an interactive spot-rate chart inline. Use this when the user asks to plot or visualize a currency pair.. It is categorised as a Read tool in the FXMacroData MCP Server, which means it retrieves data without modifying state.
Register the FXMacroData MCP server in PolicyLayer and add a rule for forex_visual_artifact: 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 FXMacroData. Nothing to install.
forex_visual_artifact 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_visual_artifact 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_visual_artifact. 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_visual_artifact is provided by the FXMacroData MCP server (https://fxmacrodata.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 15 FXMacroData tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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