Get child blocks of a given block or page
AI agents call get_block_children to retrieve information from Wolai 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 hierarchical data (child blocks) from a knowledge base structure. It performs a query operation without modifying, deleting, or executing any actions. The verb 'get' and the read-only nature of fetching children of existing blocks clearly places this in the Read category with low severity due to minimal blast radius from misuse.
From the tool's definition Tool name 'get_block_children' and description 'Get child blocks of a given block or page' indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
Get child blocks of a given block or page. It is categorised as a Read tool in the Wolai MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Wolai MCP Server MCP server in PolicyLayer and add a rule for get_block_children: 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 Wolai MCP Server. Nothing to install.
get_block_children 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_children 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_children. 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_children is provided by the Wolai MCP Server MCP server (wuchaoli/wolai-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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