Get upcoming corporate events calendar for a stock.
AI agents call get_calendar to retrieve information from yfinance 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 upcoming corporate events (earnings dates, dividend dates, splits, etc.) from Yahoo Finance for informational purposes. It is a read-only query operation that accesses financial data without any side effects, modifications, or irreversible actions.
From the tool's definition Tool name 'get_calendar' and description 'Get upcoming corporate events calendar for a stock' indicate retrieval of publicly available calendar data with no modification, creation, or deletion of data.
Attacks that exploit this kind of access
Get upcoming corporate events calendar for a stock. It is categorised as a Read tool in the yfinance MCP Server MCP Server, which means it retrieves data without modifying state.
Register the yfinance MCP Server MCP server in PolicyLayer and add a rule for get_calendar: 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 yfinance MCP Server. Nothing to install.
get_calendar 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_calendar 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_calendar. 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_calendar is provided by the yfinance MCP Server MCP server (torosent/yfinance-mcp). 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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