Get all triples for a resource (Concise Bounded Description). Args: - uri: URI of the resource - depth: 1 for direct properties only, 2 to include linked resources (default: 1) Returns: - All properties and values of the resource When to use this vs X: - vs \
AI agents call describe_resource to retrieve information from Schema Gov It MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a pure read operation that queries and returns semantic data about resources in the Italian government data catalog. The depth parameter simply controls the scope of retrieval (direct vs. linked resources), not the nature of the operation. No side effects, reversibility concerns, or external execution are involved. It is analogous to a GET request or SELECT query with no WHERE DELETE/UPDATE clauses.
From the tool's definition The tool 'describe_resource' retrieves triples and properties for a resource using a URI parameter. It returns 'all properties and values of the resource' with optional depth control.
Documented attack patterns abuse exactly the kind of access describe_resource gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Schema Gov It MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for describe_resource:
{
"version": "1",
"default": "deny",
"tools": {
"describe_resource": {}
}
}describe_resource is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get all triples for a resource (Concise Bounded Description). Args: - uri: URI of the resource - depth: 1 for direct properties only, 2 to include linked resources (default: 1) Returns: - All properties and values of the resource When to use this vs X: - vs \. It is categorised as a Read tool in the Schema Gov It MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Schema Gov It MCP Server MCP server in PolicyLayer and add a rule for describe_resource: 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 Schema Gov It MCP Server. Nothing to install.
describe_resource 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 describe_resource 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 describe_resource. 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.
describe_resource is provided by the Schema Gov It MCP Server MCP server (italia/dati-semantic-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Schema Gov It MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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47 Schema Gov It MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.