Enrich trades with market context from market.enriched + market.spot_daily (ticker-specific + VIX tickers) and market.enriched_context using correct temporal joins. Open-known fields (Gap_Pct, VIX_Open, Prior_Range_vs_ATR) use same-day values. Close-derived fields (VIX_Close, RSI_14, Vol_Regime, ...
AI agents call enrich_trades to retrieve information from Tradeblocks without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Even though enrich_trades only reads data, uncontrolled read access leaks sensitive information and racks up API costs — an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
Enrich trades with market context from market.enriched + market.spot_daily (ticker-specific + VIX tickers) and market.enriched_context using correct temporal joins. Open-known fields (Gap_Pct, VIX_Open, Prior_Range_vs_ATR) use same-day values. Close-derived fields (VIX_Close, RSI_14, Vol_Regime, Realized_Vol_5D/20D, VIX_IVR, VIX_IVP) use prior trading day values to prevent lookahead bias. Enrichment fields: Realized_Vol_5D, Realized_Vol_20D, VIX_IVR, VIX_IVP, Prior_Range_vs_ATR. Use includeOutcomeFields=true for post-hoc analysis (with clear warning). Use includeIntradayContext=true to get raw intraday bars (intradayBars: [{time, open, high, low, close}]) from market.spot. Returns warnings when market data is partially missing. It is categorised as a Read tool in the Tradeblocks MCP Server, which means it retrieves data without modifying state.
Register the Tradeblocks MCP server in PolicyLayer and add a rule for enrich_trades: 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 Tradeblocks. Nothing to install.
enrich_trades 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 enrich_trades 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 enrich_trades. 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.
enrich_trades is provided by the Tradeblocks MCP server (tradeblocks-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.