[DEPRECATED] Get detailed information about a specific class including attributes, methods, and inheritance. Use schema_query(operation=
AI agents call schema_describe_class to retrieve information from Engineering 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 class definitions. It performs information retrieval without creating, modifying, deleting, or executing operations. The deprecation status and incomplete description do not change its fundamental read-only nature. Classification as Read with low severity is appropriate given the limited blast radius of accessing schema information.
From the tool's definition Tool name 'schema_describe_class' and description indicate it retrieves detailed information about a class (attributes, methods, inheritance). The verb 'Get' and read-only nature of schema introspection confirm no modifications or side effects.
Documented attack patterns abuse exactly the kind of access schema_describe_class gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Engineering MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for schema_describe_class:
{
"version": "1",
"default": "deny",
"tools": {
"schema_describe_class": {}
}
}schema_describe_class is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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[DEPRECATED] Get detailed information about a specific class including attributes, methods, and inheritance. Use schema_query(operation=. It is categorised as a Read tool in the Engineering MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Engineering MCP Server MCP server in PolicyLayer and add a rule for schema_describe_class: 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 Engineering MCP Server. Nothing to install.
schema_describe_class 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 schema_describe_class 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 schema_describe_class. 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.
schema_describe_class is provided by the Engineering MCP Server MCP server (puran-water/dexpi-sfiles-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Engineering MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
72 Engineering MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.