Get the top cryptocurrencies by market cap.
AI agents call crypto_top to retrieve information from Mcp Everything without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays publicly available cryptocurrency market capitalization rankings. It performs no creation, modification, deletion, or execution of commands. The operation is read-only with no ability to affect external systems or financial transactions. The data retrieved is informational only, similar to looking up a stock price or market index.
From the tool's definition Tool name 'crypto_top' and description 'Get the top cryptocurrencies by market cap' indicate a retrieval operation that queries public cryptocurrency market data without modification or side effects.
Attacks that exploit this kind of access
Get the top cryptocurrencies by market cap. It is categorised as a Read tool in the Mcp Everything MCP Server, which means it retrieves data without modifying state.
Register the Mcp Everything MCP server in PolicyLayer and add a rule for crypto_top: 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 Everything. Nothing to install.
crypto_top 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 crypto_top 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 crypto_top. 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.
crypto_top is provided by the Mcp Everything MCP server (wellix260/mcp-everything). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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