Used to look up balance by public key (32 byte base58 encoded address)
AI agents call getBalance to retrieve information from Solana Model Context Protocol (MCP) Demo without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves the balance associated with a Solana account address. It performs a read-only operation on the blockchain without modifying, executing, or deleting any data. While balance information could be considered sensitive, exposure is limited to public blockchain data that is already accessible through standard RPC endpoints.
From the tool's definition Tool name 'getBalance' and description 'look up balance by public key' indicate a data retrieval operation with no side effects.
Documented attack patterns abuse exactly the kind of access getBalance gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Solana Model Context Protocol (MCP) Demo, and nothing reaches the server without passing your rules. This is the rule we recommend for getBalance:
{
"version": "1",
"default": "deny",
"tools": {
"getBalance": {}
}
}getBalance is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Used to look up balance by public key (32 byte base58 encoded address). It is categorised as a Read tool in the Solana Model Context Protocol (MCP) Demo MCP Server, which means it retrieves data without modifying state.
Register the Solana Model Context Protocol (MCP) Demo MCP server in PolicyLayer and add a rule for getBalance: 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 Model Context Protocol (MCP) Demo. Nothing to install.
getBalance 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 getBalance 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 getBalance. 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.
getBalance is provided by the Solana Model Context Protocol (MCP) Demo MCP server (solana-foundation/solana-dev-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 4 Solana Model Context Protocol (MCP) Demo tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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4 Solana Model Context Protocol (MCP) Demo tools catalogued and risk-classified — across an index of 42,500+ MCP servers.