Sign a Solana blockchain transaction
AI agents use signSolanaTransaction to commit financial operations through Beep MCP Server — usually the final step of a payment, billing, or trading workflow. A call moves real money.
Signing a Solana transaction is a direct step in committing a financial operation on the blockchain. Once signed, a transaction can be broadcast and becomes irreversible. Given the server context explicitly mentions payments, bounties, and the Beep payment network, this tool is clearly part of a financial workflow.
From the tool's definition Sign a Solana blockchain transaction — signing a transaction on Solana is a prerequisite to broadcasting and finalizing financial transfers on the blockchain
Attacks that exploit this kind of access
Sign a Solana blockchain transaction. It is categorised as a Financial tool in the Beep MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Beep MCP Server MCP server in PolicyLayer and add a rule for signSolanaTransaction: 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 Beep MCP Server. Nothing to install.
signSolanaTransaction is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the signSolanaTransaction 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 signSolanaTransaction. 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.
signSolanaTransaction is provided by the Beep MCP Server MCP server (lamdanghoang/beep-mcp-server). 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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