Constructs a Polymarket CLOB limit order payload ready for EIP-712 off-chain signing and submission to the Polymarket REST API. Polymarket uses off-chain order signing with on-chain settlement — this tool returns the EIP-712 typed-data (domain, types, message) that the agent must sign with its Po...
Part of the Syenite server.
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AI agents call prediction.order to retrieve information from Syenite without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though prediction.order only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"prediction.order": {}
}
}See the full Syenite policy for all 46 tools.
These attack patterns abuse exactly the kind of access prediction.order gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Constructs a Polymarket CLOB limit order payload ready for EIP-712 off-chain signing and submission to the Polymarket REST API. Polymarket uses off-chain order signing with on-chain settlement — this tool returns the EIP-712 typed-data (domain, types, message) that the agent must sign with its Polygon EOA private key, then POST to https://clob.polymarket.com/order with CLOB API authentication headers; it is not compatible with tx.simulate, tx.verify, or tx.receipt because no on-chain transaction is broadcast until settlement. Requires tokenId (from prediction.trending/search), side (buy or sell), outcome (YES or NO — label only), size (shares, positive), price (0–1 exclusive, USDC per share), and maker (Polygon EOA address); optionally pass expiration (unix seconds, 0 = GTC). Before the first order, the maker must approve the CTF Exchange contract to spend USDC on Polygon — the response includes approval details. Use prediction.quote first to validate fill price and available depth.. It is categorised as a Read tool in the Syenite MCP Server, which means it retrieves data without modifying state.
Register the Syenite MCP server in PolicyLayer and add a rule for prediction.order: 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 Syenite. Nothing to install.
prediction.order 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 prediction.order 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 prediction.order. 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.
prediction.order is provided by the Syenite MCP server (@syenite/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 46 Syenite tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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