Get memories organized as a knowledge graph with entities and relationships
AI agents call get_knowledge_graph to retrieve information from r3 (Recall) without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries structured memory data (entities and relationships in a knowledge graph format). It performs a read-only operation with no side effects on the underlying data store. While it accesses potentially sensitive memory/context information, the blast radius of misuse is limited to information disclosure rather than data loss, service disruption, or unauthorized actions.
From the tool's definition Tool description states 'Get memories organized as a knowledge graph with entities and relationships' — the verb 'Get' indicates retrieval without modification. No language suggests data alteration, deletion, or execution of operations.
Attacks that exploit this kind of access
Get memories organized as a knowledge graph with entities and relationships. It is categorised as a Read tool in the r3 (Recall) MCP Server, which means it retrieves data without modifying state.
Register the r3 (Recall) MCP server in PolicyLayer and add a rule for get_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 r3 (Recall). Nothing to install.
get_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 get_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 get_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.
get_knowledge_graph is provided by the r3 (Recall) MCP server (n3wth/r3). 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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