Get available trading instruments.
AI agents call get_instruments to retrieve information from Deribit MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or lists available trading instruments from the Deribit exchange—a read-only operation with no side effects. It falls squarely into the 'Read' category. Severity is low because the blast radius of exposing instrument listing data is minimal; an AI agent cannot cause harm by retrieving this information, which is typically public market data.
From the tool's definition Tool name 'get_instruments' and description 'Get available trading instruments' indicate a retrieval operation that queries available data without modifying state or executing external operations.
Attacks that exploit this kind of access
Get available trading instruments. It is categorised as a Read tool in the Deribit MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Deribit MCP Server MCP server in PolicyLayer and add a rule for get_instruments: 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 Deribit MCP Server. Nothing to install.
get_instruments 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_instruments 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_instruments. 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_instruments is provided by the Deribit MCP Server MCP server (oishh/telegram-signal-mcp-server). 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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