get-block-by-number · Monad MCP Server MCP: Risk & Policy

WHAT IT DOES

What get-block-by-number does on Monad MCP Server

AI agents call get-block-by-number to retrieve information from Monad MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

WHY IT NEEDS A POLICY

Why get-block-by-number needs a policy

This tool queries blockchain state (block data) without altering any data or executing external operations. It poses minimal risk as an AI agent cannot cause harm by reading historical block information. The low severity reflects that block retrieval is informational only and has no destructive, financial, or code-execution implications.

From the tool's definition Tool description states 'Get a block by number on Monad testnet' — a retrieval operation with no side effects. The verb 'get' and lack of any modification language (send, deploy, delete, etc.) confirm read-only semantics.

Attacks that exploit this kind of access

Questions about get-block-by-number

What does the get-block-by-number tool do? +

Get a block by number on Monad testnet. It is categorised as a Read tool in the Monad MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get-block-by-number? +

Register the Monad MCP Server MCP server in PolicyLayer and add a rule for get-block-by-number: 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 Monad MCP Server. Nothing to install.

What risk level is get-block-by-number? +

get-block-by-number is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get-block-by-number? +

Yes. Add a rate_limit block to the get-block-by-number 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.

How do I block get-block-by-number completely? +

Set action: deny in the PolicyLayer policy for get-block-by-number. 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.

What MCP server provides get-block-by-number? +

get-block-by-number is provided by the Monad MCP Server MCP server (monad-vibe/monad-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.