AI agents call get_block to retrieve information from 0g without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves immutable historical blockchain data (block information) based on a block number or hash identifier. There are no side effects, no data modification, no code execution, and no financial operations. It is a pure read operation consistent with blockchain explorer functionality.
From the tool's definition Tool name 'get_block' and description 'Get block information by number or hash' indicate a retrieval operation with no side effects. It queries blockchain data without modifying, deleting, or executing any state-changing operations.
Attacks that exploit this kind of access
Get block information by number or hash. It is categorised as a Read tool in the 0g MCP Server, which means it retrieves data without modifying state.
Register the 0g MCP server in PolicyLayer and add a rule for get_block: 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 0g. Nothing to install.
get_block 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_block 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_block. 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_block is provided by the 0g MCP server (opencolin/0g-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
get_block is one line of 0g's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
Teams ship this data inside their own products. See what a licence covers →