Get basic financial metrics for a company
AI agents call get_basic_financials to retrieve information from MCP Finnhub 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 queries financial data from Finnhub's API without creating, modifying, deleting, or executing any operations. It has no side effects on the financial system or data—it only provides read access to publicly available company financial metrics. The blast radius is minimal: misuse would result in data retrieval only, not financial transactions, asset modifications, or system changes.
From the tool's definition Tool name 'get_basic_financials' and description 'Get basic financial metrics for a company' indicate retrieval of financial data with no modification or execution capability. The verb 'get' is a classic Read operation.
Attacks that exploit this kind of access
Get basic financial metrics for a company. It is categorised as a Read tool in the MCP Finnhub Server MCP Server, which means it retrieves data without modifying state.
Register the MCP Finnhub Server MCP server in PolicyLayer and add a rule for get_basic_financials: 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 MCP Finnhub Server. Nothing to install.
get_basic_financials 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_basic_financials 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_basic_financials. 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_basic_financials is provided by the MCP Finnhub Server MCP server (nimblebraininc/mcp-finnhub). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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