AI agents call get_parent_schema to retrieve information from Nocobase without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves UI schema information based on a node identifier (UID). It performs a read-only operation that fetches data without creating, modifying, deleting, or executing any changes to the system. The use of 'Get' in the name and the retrieval nature of the operation clearly categorize this as a Read operation with low severity due to lack of side effects.
From the tool's definition Tool name 'get_parent_schema' and description 'Get the parent UI schema of a node by UID' indicate a retrieval operation with no modification or side effects.
Attacks that exploit this kind of access
Get the parent UI schema of a node by UID. It is categorised as a Read tool in the Nocobase MCP Server, which means it retrieves data without modifying state.
Register the Nocobase MCP server in PolicyLayer and add a rule for get_parent_schema: 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 Nocobase. Nothing to install.
get_parent_schema 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_parent_schema 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_parent_schema. 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_parent_schema is provided by the Nocobase MCP server (puguhsudarma/nocobase-mcp-server). 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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