AI agents call ocsf_get_class to retrieve information from Tenzir MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'get' verb combined with sibling tools that retrieve OCSF schema information strongly suggests this retrieves class definitions from the OCSF schema. No side effects expected from querying schema metadata. Although the description is empty (lowering confidence slightly), the naming convention and server context clearly indicate a read-only data retrieval operation.
From the tool's definition Tool name is 'ocsf_get_class' and description is empty. Based on sibling tools naming patterns (ocsf_get_latest_version, ocsf_get_object, ocsf_get_versions), the 'get' prefix indicates a retrieval operation.
Documented attack patterns abuse exactly the kind of access ocsf_get_class gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Tenzir MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for ocsf_get_class:
{
"version": "1",
"default": "deny",
"tools": {
"ocsf_get_class": {}
}
}ocsf_get_class is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
ocsf_get_class. It is categorised as a Read tool in the Tenzir MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Tenzir MCP Server MCP server in PolicyLayer and add a rule for ocsf_get_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 Tenzir MCP Server. Nothing to install.
ocsf_get_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 ocsf_get_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 ocsf_get_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.
ocsf_get_class is provided by the Tenzir MCP Server MCP server (tenzir/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Tenzir 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.
15 Tenzir MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.