Read the entire knowledge graph
AI agents call read_graph to retrieve information from Elastic Brain ZH without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only query of the knowledge graph data structure. It retrieves information without side effects, matching the Read category definition. Severity is low because reading data alone poses minimal risk even if an AI agent accesses it; the blast radius is limited to potential information disclosure of stored knowledge, not system compromise or data loss.
From the tool's definition Tool name 'read_graph' and description 'Read the entire knowledge graph' explicitly indicate a retrieval operation with no modification or deletion.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
Read the entire knowledge graph. It is categorised as a Read tool in the Elastic Brain ZH MCP Server, which means it retrieves data without modifying state.
Register the Elastic Brain ZH MCP server in PolicyLayer and add a rule for read_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 Elastic Brain ZH. Nothing to install.
read_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 read_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 read_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.
read_graph is provided by the Elastic Brain ZH MCP server (tocharianou/elastic-brain-zh). 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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