AI agents use sell_shares to commit financial operations through Manifold — usually the final step of a payment, billing, or trading workflow. A call moves real money.
Selling shares in a prediction market is a financial operation that moves value, modifies account balances, and executes trades. It falls squarely in the Financial category as it commits financial obligations and moves funds between parties in a market.
From the tool's definition 'Sell shares in a market' — directly executes a financial transaction by selling prediction market shares, committing a financial action on the user's account
Attacks that exploit this kind of access
Sell shares in a market. It is categorised as a Financial tool in the Manifold MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Manifold MCP server in PolicyLayer and add a rule for sell_shares: 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 Manifold. Nothing to install.
sell_shares is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the sell_shares 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 sell_shares. 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.
sell_shares is provided by the Manifold MCP server (manifold-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
sell_shares is one line of Manifold's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →