Scan symbols for recent bullish or bearish crossovers such as SMA(20) over SMA(50) on 1d candles.
AI agents call scan_indicator_crossover 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 passive scan/query of market data to detect technical patterns. It retrieves and analyzes information (bullish/bearish crossover signals) without creating orders, modifying data, executing code on external systems, or committing financial transactions. The capability is informational only, similar to a market screener.
From the tool's definition scan_indicator_crossover scans symbols for technical indicator crossovers (SMA(20) over SMA(50) on daily candles).
Attacks that exploit this kind of access
Scan symbols for recent bullish or bearish crossovers such as SMA(20) over SMA(50) on 1d candles. 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 scan_indicator_crossover: 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.
scan_indicator_crossover 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 scan_indicator_crossover 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 scan_indicator_crossover. 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.
scan_indicator_crossover 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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