指定した子サーバーのToolsとResourcesの定義情報を取得します。
AI agents call get_schema to retrieve information from MCP Gateway (Parent MCP Server) without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and returns metadata about available tools and resources on child servers. It is a read-only introspection operation with no side effects—it merely discovers what capabilities exist without executing them or modifying any state. The blast radius is minimal: worst case, an agent learns what tools are available, which is already discoverable information.
From the tool's definition Tool name 'get_schema' and description indicating it retrieves/fetches (「取得します」= 'to retrieve/obtain') schema definitions for Tools and Resources from a specified child server. No modification, execution, or deletion occurs.
Attacks that exploit this kind of access
指定した子サーバーのToolsとResourcesの定義情報を取得します。. It is categorised as a Read tool in the MCP Gateway (Parent MCP Server) MCP Server, which means it retrieves data without modifying state.
Register the MCP Gateway (Parent MCP Server) MCP server in PolicyLayer and add a rule for get_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 MCP Gateway (Parent MCP Server). Nothing to install.
get_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_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_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_schema is provided by the MCP Gateway (Parent MCP Server) MCP server (tomcat2357/mcpgateway). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
get_schema is one line of MCP Gateway (Parent MCP Server)'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 →