Get the latest blockhash needed for building Solana transactions
AI agents call get_latest_blockhash to retrieve information from Solafon MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves the latest blockhash from the Solana blockchain, which is a read-only operation with no side effects. A blockhash is a reference value used when constructing transactions, but fetching it does not initiate or commit any transaction itself.
From the tool's definition Get the latest blockhash needed for building Solana transactions
Attacks that exploit this kind of access
Get the latest blockhash needed for building Solana transactions. It is categorised as a Read tool in the Solafon MCP MCP Server, which means it retrieves data without modifying state.
Register the Solafon MCP server in PolicyLayer and add a rule for get_latest_blockhash: 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 Solafon MCP. Nothing to install.
get_latest_blockhash 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_latest_blockhash 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_latest_blockhash. 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_latest_blockhash is provided by the Solafon MCP server (solafon/solafon-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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