Get the SPL token balance of a wallet for a specific token mint
AI agents call get_token_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 queries chain data to retrieve the current token balance for a given wallet and mint address. It performs no mutations, transactions, code execution, or destructive operations. It is purely informational and falls clearly into the Read category with low severity since balance queries have no blast radius beyond information disclosure.
From the tool's definition Tool name is 'get_token_balance' with description 'Get the SPL token balance of a wallet for a specific token mint' — uses 'Get' verb indicating a retrieval operation with no side effects.
Attacks that exploit this kind of access
Get the SPL token balance of a wallet for a specific token mint. 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_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 Solana 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 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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