memory_read
AI agents call memory_read to retrieve information from Hippocampus Memory MCP Server 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 stored memory data using semantic search without modifying, deleting, or executing external operations. Even though the description is empty, the naming convention and context of sibling tools clearly indicate read-only retrieval functionality with no side effects. The blast radius is minimal—an AI agent querying memory cannot cause harm beyond information disclosure.
From the tool's definition Tool name is 'memory_read' and sibling tools include 'memory_write', 'memory_consolidate', and 'memory_forget', indicating a CRUD-style API where 'memory_read' performs retrieval operations.
Attacks that exploit this kind of access
memory_read. It is categorised as a Read tool in the Hippocampus Memory MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Hippocampus Memory MCP Server MCP server in PolicyLayer and add a rule for memory_read: 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 Hippocampus Memory MCP Server. Nothing to install.
memory_read 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 memory_read 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 memory_read. 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.
memory_read is provided by the Hippocampus Memory MCP Server MCP server (jameslovespancakes/memory-mcp). 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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