Search the instruments master when a user wants matching tradable instruments or needs multiple results.
AI agents call find_instruments to retrieve information from Nubra MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only search operation against an instruments database. It retrieves matching instrument records in response to a query but does not create, modify, delete, execute code, or trigger transactions. The action is purely informational lookup, fitting the 'Read' category with low severity since data retrieval poses minimal risk even if misused by an AI agent.
From the tool's definition Tool name 'find_instruments' and description 'Search the instruments master when a user wants matching tradable instruments or needs multiple results' indicate a search/query operation that retrieves data without modification or side effects.
Attacks that exploit this kind of access
Search the instruments master when a user wants matching tradable instruments or needs multiple results. It is categorised as a Read tool in the Nubra MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Nubra MCP Server MCP server in PolicyLayer and add a rule for find_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 Nubra MCP Server. Nothing to install.
find_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 find_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 find_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.
find_instruments is provided by the Nubra MCP Server MCP server (socials-zanskar/nubra-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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