Get weekly time series data for a cryptocurrency
AI agents call get-crypto-weekly 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.
This tool retrieves cryptocurrency time series data for analysis or display purposes. It queries financial market data without creating, modifying, deleting, or executing any operations. The blast radius of misuse is minimal—an agent could only retrieve data that is already public market information, posing no financial, destructive, or operational risk.
From the tool's definition Tool name 'get-crypto-weekly' and description 'Get weekly time series data for a cryptocurrency' indicate data retrieval with no modification. The verb 'get' and the stated function of fetching historical time series data confirm read-only behavior.
Attacks that exploit this kind of access
Get weekly time series data for a cryptocurrency. It is categorised as a Read tool in the Stocks MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Stocks MCP Server MCP server in PolicyLayer and add a rule for get-crypto-weekly: 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.
get-crypto-weekly 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-crypto-weekly 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-crypto-weekly. 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-crypto-weekly 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.
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