Find symbols opening above the previous close by a configurable percentage using Nubra historical data.
AI agents call find_gap_up_candidates 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 retrieves and filters historical price data to identify symbols meeting specific criteria (gap-up percentage). It performs no write operations, executes no external commands, triggers no orders, and modifies no data. It is purely analytical and informational in nature, consistent with Read category tools like search, list, or filter functions.
From the tool's definition Tool description states it 'find[s] symbols' and 'using Nubra historical data'—retrieval and query operations with no modification or execution of trades. The name 'find_gap_up_candidates' indicates a search/filtering function over existing data.
Attacks that exploit this kind of access
Find symbols opening above the previous close by a configurable percentage using Nubra historical data. 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_gap_up_candidates: 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_gap_up_candidates 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_gap_up_candidates 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_gap_up_candidates. 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_gap_up_candidates 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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