get-time-series · Stocks MCP Server MCP: Risk & Policy

WHAT IT DOES

What get-time-series does on Stocks MCP Server

AI agents call get-time-series to retrieve information from Stocks MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

WHY IT NEEDS A POLICY

Why get-time-series needs a policy

This tool retrieves historical stock price data without side effects. It performs a read-only query operation that returns time series information. No data is created, modified, deleted, or financial transactions are executed. The blast radius of misuse is minimal—an agent could only retrieve accessible historical data, which poses negligible security risk.

From the tool's definition Tool name 'get-time-series' and description 'Get daily time series data for a stock' indicate a retrieval operation. No modification, deletion, or execution of code/commands is involved. The verb 'get' explicitly denotes data retrieval.

Attacks that exploit this kind of access

Questions about get-time-series

What does the get-time-series tool do? +

Get daily time series data for a stock. It is categorised as a Read tool in the Stocks MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get-time-series? +

Register the Stocks MCP Server MCP server in PolicyLayer and add a rule for get-time-series: 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 Stocks MCP Server. Nothing to install.

What risk level is get-time-series? +

get-time-series is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get-time-series? +

Yes. Add a rate_limit block to the get-time-series 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.

How do I block get-time-series completely? +

Set action: deny in the PolicyLayer policy for get-time-series. 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.

What MCP server provides get-time-series? +

get-time-series is provided by the Stocks MCP Server MCP server (maharshi2708/stocks_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.