get_descendants
AI agents call get_descendants to retrieve information from MCP Server Proto-OKN without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Despite the empty description, the tool name and its context on a SPARQL query server strongly suggest this retrieves descendant nodes or relationships from a knowledge graph without modification. Sibling tools on this server (get_description, get_schema, lookup_uri, list_graphs) are all read operations.
From the tool's definition Tool name 'get_descendants' suggests a retrieval operation similar to sibling tools like 'get_description', 'get_schema', and 'lookup_uri' on this SPARQL query server. The naming pattern indicates a read/fetch operation.
Attacks that exploit this kind of access
get_descendants. It is categorised as a Read tool in the MCP Server Proto-OKN MCP Server, which means it retrieves data without modifying state.
Register the MCP Server Proto-OKN MCP server in PolicyLayer and add a rule for get_descendants: 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 MCP Server Proto-OKN. Nothing to install.
get_descendants 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 get_descendants 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 get_descendants. 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.
get_descendants is provided by the MCP Server Proto-OKN MCP server (sbl-sdsc/mcp-proto-okn). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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