Search the knowledge graph using semantic or basic search
AI agents call search_knowledge_graph to retrieve information from ZMCPTools without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or queries data from a knowledge graph without creating, modifying, or deleting information. Semantic and basic search operations are inherently non-destructive read operations. The potential blast radius of misuse is minimal—an agent with access could retrieve unintended knowledge graph data, but this does not expose financial systems, execute arbitrary code, or cause irreversible harm.
From the tool's definition Tool name 'search_knowledge_graph' and description 'Search the knowledge graph using semantic or basic search' indicate data retrieval with no side effects. The use of 'search' verb and 'using' language for querying confirms read-only functionality.
Documented attack patterns abuse exactly the kind of access search_knowledge_graph gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and ZMCPTools, and nothing reaches the server without passing your rules. This is the rule we recommend for search_knowledge_graph:
{
"version": "1",
"default": "deny",
"tools": {
"search_knowledge_graph": {}
}
}search_knowledge_graph is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Search the knowledge graph using semantic or basic search. It is categorised as a Read tool in the ZMCPTools MCP Server, which means it retrieves data without modifying state.
Register the ZMCPTools MCP server in PolicyLayer and add a rule for search_knowledge_graph: 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 ZMCPTools. Nothing to install.
search_knowledge_graph 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 search_knowledge_graph 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 search_knowledge_graph. 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.
search_knowledge_graph is provided by the ZMCPTools MCP server (zachhandley/zmcptools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 70 ZMCPTools tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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70 ZMCPTools tools catalogued and risk-classified — across an index of 42,500+ MCP servers.