AI agents call get_transaction to retrieve information from Onchain without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and summarizes existing blockchain transaction information based on a signature parameter. It performs no modifications, deletions, executions, or financial operations—purely a data query against immutable on-chain records. The read-only nature of the server and the tool's verb ('get') confirm it is a Read category tool with low severity.
From the tool's definition Tool name 'get_transaction' and description 'Summarize a Solana transaction by its signature' indicate retrieval of transaction data. Server is explicitly described as 'read-only access' to on-chain data.
Attacks that exploit this kind of access
Summarize a Solana transaction by its signature. It is categorised as a Read tool in the Onchain MCP Server, which means it retrieves data without modifying state.
Register the Onchain MCP server in PolicyLayer and add a rule for get_transaction: 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 Onchain. Nothing to install.
get_transaction 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_transaction 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_transaction. 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_transaction is provided by the Onchain MCP server (sylvainlondon136/onchain-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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