hl_get_fills · YOSO Agent SDK MCP Server MCP: Risk & Policy

WHAT IT DOES

What hl_get_fills does on YOSO Agent SDK MCP Server

AI agents call hl_get_fills 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.

WHY IT NEEDS A POLICY

Why hl_get_fills needs a policy

This tool retrieves past trade execution data (fills) from Hyperliquid. It is a read-only query operation with no side effects—it does not create, modify, delete, or execute trades. While it provides financial data, the tool itself performs no financial transaction or commitment.

From the tool's definition Tool name 'hl_get_fills' and description 'Get recent fills on Hyperliquid' indicate a retrieval operation that queries historical fill data from the Hyperliquid trading platform without modifying any state.

Attacks that exploit this kind of access

Questions about hl_get_fills

What does the hl_get_fills tool do? +

Get recent fills on Hyperliquid. It is categorised as a Read tool in the YOSO Agent SDK MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on hl_get_fills? +

Register the YOSO Agent SDK MCP Server MCP server in PolicyLayer and add a rule for hl_get_fills: 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.

What risk level is hl_get_fills? +

hl_get_fills is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit hl_get_fills? +

Yes. Add a rate_limit block to the hl_get_fills 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.

How do I block hl_get_fills completely? +

Set action: deny in the PolicyLayer policy for hl_get_fills. 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.

What MCP server provides hl_get_fills? +

hl_get_fills 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.