Get the SOL balance of a Solana wallet address
AI agents call get_balance to retrieve information from Solana 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 balance information from the blockchain without modifying state, creating transactions, or executing code. It is a pure read operation analogous to querying account data. While the server as a whole supports destructive financial operations (token swaps, transactions), this specific tool is limited to data retrieval, making it the lowest severity category.
From the tool's definition Tool description states 'Get the SOL balance of a Solana wallet address' - this is a retrieval operation with no side effects. The name 'get_balance' and verb 'Get' confirm query-only functionality.
Attacks that exploit this kind of access
Get the SOL balance of a Solana wallet address. It is categorised as a Read tool in the Solana MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Solana 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 Solana 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 Solana MCP Server MCP server (visioneth/solana-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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