Exact USDB you can claim from a settled round. 0 means nothing to claim (lost / already claimed / pending / no bet).
AI agents call updown_quote_claim 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 the current claimable balance from a prediction market round without executing a claim transaction or moving funds. It is purely informational—analogous to a balance check. The low severity reflects that misuse would only expose data about the user's own winnings, with no financial or operational consequence.
From the tool's definition Tool description states it retrieves/queries 'Exact USDB you can claim from a settled round' with no mention of state modification, fund transfer, or side effects.
Attacks that exploit this kind of access
Exact USDB you can claim from a settled round. 0 means nothing to claim (lost / already claimed / pending / no bet). 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_quote_claim: 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_quote_claim 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_quote_claim 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_quote_claim. 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_quote_claim 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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