Current bull probability for the active UPDOWN round (basis points 0-10000, also returned as percentage).
AI agents call updown_bull_probability to retrieve information from Basis MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns existing state data (bull probability in basis points and percentage format) from a prediction market. It performs a simple read/fetch operation on market data without modifying state, executing commands, or committing financial obligations. The low severity reflects that misuse only impacts information retrieval.
From the tool's definition Tool description states it returns 'current bull probability for the active UPDOWN round' - a query operation that retrieves data about prediction market state with no side effects.
Attacks that exploit this kind of access
Current bull probability for the active UPDOWN round (basis points 0-10000, also returned as percentage). It is categorised as a Read tool in the Basis MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Basis MCP Server MCP server in PolicyLayer and add a rule for updown_bull_probability: 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 Basis MCP Server. Nothing to install.
updown_bull_probability 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 updown_bull_probability 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 updown_bull_probability. 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.
updown_bull_probability is provided by the Basis MCP Server MCP server (launch-on-basis/mcp-ts). 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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