AI agents call market.events.probability_map to retrieve information from Rekko MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves probability data for analysis purposes with no side effects. It is Read category (fetch/query operation). Severity is medium rather than low because: (1) probability estimates are actionable intelligence that could directly inform financial decisions, and (2) an AI agent could use retrieved probabilities to make high-stakes trading calls, though the tool itself only reads data and doesn't execute…
From the tool's definition Tool description states 'Get probability estimates' - a retrieval operation with no modification capability. The name 'probability_map' indicates data lookup/fetch rather than action. Context shows this is market intelligence/analytics on prediction platforms.
Attacks that exploit this kind of access
Get probability estimates for all sub-markets within an event. It is categorised as a Read tool in the Rekko MCP MCP Server, which means it retrieves data without modifying state.
Register the Rekko MCP server in PolicyLayer and add a rule for market.events.probability_map: 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 Rekko MCP. Nothing to install.
market.events.probability_map 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 market.events.probability_map 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 market.events.probability_map. 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.
market.events.probability_map is provided by the Rekko MCP server (rekko-ai/rekko-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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