Calculate cost to withdraw a coin from an exchange
AI agents call calculate_withdrawal_fees to retrieve information from Crypto Portfolio MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a calculation based on existing exchange fee data without modifying any state, executing code, or moving funds. It retrieves and processes information to answer a question about withdrawal costs. No side effects or irreversible actions occur. The read-only nature of the server confirms this is a data retrieval and analytics tool.
From the tool's definition Tool name 'calculate_withdrawal_fees' and description 'Calculate cost to withdraw a coin from an exchange' indicate a query/calculation operation that retrieves fee information.
Attacks that exploit this kind of access
Calculate cost to withdraw a coin from an exchange. It is categorised as a Read tool in the Crypto Portfolio MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Crypto Portfolio MCP Server MCP server in PolicyLayer and add a rule for calculate_withdrawal_fees: 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 Crypto Portfolio MCP Server. Nothing to install.
calculate_withdrawal_fees 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 calculate_withdrawal_fees 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 calculate_withdrawal_fees. 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.
calculate_withdrawal_fees is provided by the Crypto Portfolio MCP Server MCP server (lev-corrupted/cryptoportfoliomcpserver). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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