AI agents call get_top_coins to retrieve information from My without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only query to fetch public market data about cryptocurrencies. It has no side effects, cannot modify or delete data, and does not execute arbitrary code or trigger financial transactions. While it provides market information that could inform financial decisions, it does not itself move money or commit financial obligations.
From the tool's definition Tool is described as 'Get top cryptocurrencies by market cap' — a retrieval operation that queries cryptocurrency market data without modification, deletion, or execution of external commands.
Attacks that exploit this kind of access
Get top cryptocurrencies by market cap. It is categorised as a Read tool in the My MCP Server, which means it retrieves data without modifying state.
Register the My MCP server in PolicyLayer and add a rule for get_top_coins: 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 My. Nothing to install.
get_top_coins 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_top_coins 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_top_coins. 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_top_coins is provided by the My MCP server (ovezthaking/mcp-server). 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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