Get a single block
AI agents call getOneBlock to retrieve information from Somnia MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves block information from the Somnia blockchain without modifying any state or triggering external operations. It is a straightforward read operation with minimal blast radius if misused—the worst outcome would be excessive queries or information disclosure of already-public blockchain data.
From the tool's definition Tool name 'getOneBlock' and description 'Get a single block' indicate data retrieval. The sibling tools (getBlockHeights, getBlockTransactions, getBulkTransactions, getERC20Balance, etc.) are all query/retrieval operations against blockchain data via the ORMI…
Attacks that exploit this kind of access
Get a single block. It is categorised as a Read tool in the Somnia MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Somnia MCP Server MCP server in PolicyLayer and add a rule for getOneBlock: 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 Somnia MCP Server. Nothing to install.
getOneBlock 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 getOneBlock 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 getOneBlock. 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.
getOneBlock is provided by the Somnia MCP Server MCP server (vastavikadi/somnia-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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