Download and preview the first rows of a distribution file. Most useful after you already identified a concrete distribution URL. On schema.gov.it, distributions often belong to semantic assets rather than classic tabular datasets. Args: - url: Download URL of the distribution (CSV or JSON) Retur...
AI agents call preview_distribution 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 tool retrieves and displays data without modification, deletion, or execution of code. It queries a remote distribution file and returns a preview subset. No side effects, no data changes, no destructive operations. The timeout and preview-only nature (first 10-15 rows) further constrain risk. Classified as Read with low severity due to the limited data exposure from preview-only access.
From the tool's definition Tool description explicitly states it 'Download and preview the first rows of a distribution file' with returns showing 'Preview of first 10-15 rows/items of data'. The operation is read-only retrieval with a 10-second timeout limiting scope.
Documented attack patterns abuse exactly the kind of access preview_distribution 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 preview_distribution:
{
"version": "1",
"default": "deny",
"tools": {
"preview_distribution": {}
}
}preview_distribution is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Download and preview the first rows of a distribution file. Most useful after you already identified a concrete distribution URL. On schema.gov.it, distributions often belong to semantic assets rather than classic tabular datasets. Args: - url: Download URL of the distribution (CSV or JSON) Returns: - Preview of first 10-15 rows/items of data Supported formats: CSV, JSON (auto-detected by content-type or extension) Timeout: 10 seconds. 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 preview_distribution: 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.
preview_distribution 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 preview_distribution 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 preview_distribution. 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.
preview_distribution 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.