Check the USDC and SOL balance of the agent wallet. Returns balances on Solana devnet.
AI agents call get_balance to retrieve information from Agent Wallet MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only reads and returns balance information from the wallet on Solana's devnet test network. It has no side effects, does not transfer funds, and does not execute transactions. While the server overall handles financial operations, this specific tool is a read-only query. The use of devnet (test network) rather than mainnet further reduces real-world financial risk.
From the tool's definition Tool name 'get_balance' and description 'Check the USDC and SOL balance of the agent wallet. Returns balances on Solana devnet.' indicate a query operation that retrieves wallet balances without modifying or moving funds.
Attacks that exploit this kind of access
Check the USDC and SOL balance of the agent wallet. Returns balances on Solana devnet. It is categorised as a Read tool in the Agent Wallet MCP MCP Server, which means it retrieves data without modifying state.
Register the Agent Wallet 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 Agent Wallet MCP. 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 Agent Wallet MCP server (noah-ing/agent-wallet-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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