get_token_balance
AI agents call get_token_balance to retrieve information from FourTrader 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 wallet or token balance data with no side effects. Even in the context of a cryptocurrency trading server, a balance query is a read operation with minimal risk. The absence of documentation is a minor concern, but the naming pattern and server context strongly indicate this is a data retrieval function, not a write, execute, or financial transaction tool.
From the tool's definition Tool name 'get_token_balance' indicates a read operation that retrieves balance information. The empty description is uninformative, but the name and sibling tools (buy_token, sell_token, get_bnb_balance, etc.) establish that this server manages trading…
Attacks that exploit this kind of access
get_token_balance. It is categorised as a Read tool in the FourTrader MCP Server MCP Server, which means it retrieves data without modifying state.
Register the FourTrader MCP Server MCP server in PolicyLayer and add a rule for get_token_balance: 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 FourTrader MCP Server. Nothing to install.
get_token_balance 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_token_balance 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_token_balance. 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_token_balance is provided by the FourTrader MCP Server MCP server (sunneeee/fourtrader-mcp). 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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