查询指定地址的余额（ETH和代币）
AI agents call get_balance to retrieve information from Blockchain Payment MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves balance information from blockchain addresses. It performs no state changes, does not execute transactions, and does not move funds. While the server manages financial operations, this specific tool is a read-only query that returns data without modifying anything or committing financial obligations.
From the tool's definition Tool name is 'get_balance' and description states '查询指定地址的余额（ETH和代币）' (Query balance of specified address for ETH and tokens). This is a query/retrieval operation with no side effects.
Attacks that exploit this kind of access
查询指定地址的余额（ETH和代币）. It is categorised as a Read tool in the Blockchain Payment MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Blockchain Payment MCP Server MCP server in PolicyLayer and add a rule for get_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 Blockchain Payment MCP Server. Nothing to install.
get_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_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_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_balance is provided by the Blockchain Payment MCP Server MCP server (logos-42/blockchain-payment-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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