navigate_skos_hierarchy

THE RISK

Low Risk

Why navigate_skos_hierarchy needs a policy

This tool reads and traverses a SKOS (Simple Knowledge Organization System) concept hierarchy without modifying any data. It queries relationships between concepts in an ontology/vocabulary, which is a read-only operation with no side effects.

From the tool's definition 'Navigate a SKOS hierarchy upward and/or downward from a concept' — purely retrieves and traverses existing taxonomy/hierarchy data

Documented attack patterns abuse exactly the kind of access navigate_skos_hierarchy gives an agent:

POLICY

How to control navigate_skos_hierarchy

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 navigate_skos_hierarchy:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "navigate_skos_hierarchy": {}
  }
}

navigate_skos_hierarchy is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Schema Gov It MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

Related tools and policies

More Schema Gov It MCP Server tools

Execute query_external_endpoint Execute a SPARQL query against any public HTTPS SPARQL endpoint. Args: - endpointUrl: URL Execute query_local_ontology Execute a SPARQL SELECT query against an ontology available on the server filesystem or th Execute query_sparql Execute a RAW SPARQL query against schema.gov.it. Args: - query: The SPARQL query to exec Execute query_uploaded_store Execute a SPARQL SELECT query against a temporary ontology store created via HTTP upload. Write get_upload_instructions Returns the exact curl command to upload a local RDF file to this MCP server and get back Read explore_dataset Get details of a specific Dataset including metadata and distributions. Use this for targ Read suggest_improvements Analyze the ontology for structural issues. Args: - limit: Maximum issues per category (d Read suggest_new_tools Analyze usage logs to suggest new specialized tools. Args: None Returns: - List of recom

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about navigate_skos_hierarchy

What does the navigate_skos_hierarchy tool do? +

Navigate a SKOS hierarchy upward and/or downward from a concept. Args: - uri: Concept URI - direction:. It is categorised as a Read tool in the Schema Gov It MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on navigate_skos_hierarchy? +

Register the Schema Gov It MCP Server MCP server in PolicyLayer and add a rule for navigate_skos_hierarchy: 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.

What risk level is navigate_skos_hierarchy? +

navigate_skos_hierarchy is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit navigate_skos_hierarchy? +

Yes. Add a rate_limit block to the navigate_skos_hierarchy 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.

How do I block navigate_skos_hierarchy completely? +

Set action: deny in the PolicyLayer policy for navigate_skos_hierarchy. 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.

What MCP server provides navigate_skos_hierarchy? +

navigate_skos_hierarchy 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.

Enforce policy on every Schema Gov It MCP Server tool call.

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.

CHECK YOUR STACK →