Get current spread (difference between bid and ask prices).
AI agents call get_spread to retrieve information from Polymarket 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 current market pricing information (bid-ask spread) without creating orders, executing trades, or modifying any state. It is a pure data retrieval operation analogous to fetching market quotes. Even in the context of a trading platform, retrieving public market data has minimal risk compared to tools that execute trades or manage positions.
From the tool's definition Tool name 'get_spread' and description 'Get current spread (difference between bid and ask prices)' indicate retrieval of market data with no modification or execution of trades.
Attacks that exploit this kind of access
Get current spread (difference between bid and ask prices). It is categorised as a Read tool in the Polymarket MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Polymarket MCP Server MCP server in PolicyLayer and add a rule for get_spread: 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 Polymarket MCP Server. Nothing to install.
get_spread 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 get_spread 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 get_spread. 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.
get_spread is provided by the Polymarket MCP Server MCP server (nancheng582-jpg/polymarket-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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