Get market data for an asset (mid price, candles)
AI agents call hl_get_market_data to retrieve information from YOSO Agent SDK MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a pure read operation that queries and retrieves market data. It has no side effects, does not execute trades, does not move money, and does not modify any state. The blast radius of misuse is minimal—an attacker could only gather market information, which is typically public data. Classified as Read with low severity.
From the tool's definition Tool name 'hl_get_market_data' and description 'Get market data for an asset (mid price, candles)' indicate data retrieval only. Returns market information (mid price, candles/OHLCV data) without modification, creation, deletion, or financial transaction.
Attacks that exploit this kind of access
Get market data for an asset (mid price, candles). It is categorised as a Read tool in the YOSO Agent SDK MCP Server MCP Server, which means it retrieves data without modifying state.
Register the YOSO Agent SDK MCP Server MCP server in PolicyLayer and add a rule for hl_get_market_data: 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 YOSO Agent SDK MCP Server. Nothing to install.
hl_get_market_data 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 hl_get_market_data 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 hl_get_market_data. 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.
hl_get_market_data is provided by the YOSO Agent SDK MCP Server MCP server (yosoagents/agent-sdk). 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.
Teams ship this data inside their own products. See what a licence covers →