AI agents call get_top_gainers to retrieve information from Nepse API 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 market data (presumably stocks with highest gains) from the Nepal Stock Exchange. The action is informational only with no modifications to data, no code execution, and no financial transactions. The pattern of sibling tools confirms a read-only data access server. Tool description is empty, slightly reducing confidence, but the name and context are clear.
From the tool's definition Tool name 'get_top_gainers' indicates data retrieval with no side effects. Sibling tools on the server (get_company_floorsheet, get_company_list, get_daily_*_graph, etc.) are all read-only queries of market data.
Documented attack patterns abuse exactly the kind of access get_top_gainers gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Nepse API MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_top_gainers:
{
"version": "1",
"default": "deny",
"tools": {
"get_top_gainers": {}
}
}get_top_gainers is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_top_gainers. It is categorised as a Read tool in the Nepse API MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Nepse API MCP Server MCP server in PolicyLayer and add a rule for get_top_gainers: 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 Nepse API MCP Server. Nothing to install.
get_top_gainers 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_top_gainers 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_top_gainers. 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_top_gainers is provided by the Nepse API MCP Server MCP server (surajrimal07/nepseapi-unofficial). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 38 Nepse API MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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38 Nepse API MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.