AI agents call fetch to retrieve information from Memoraeu without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves an existing memory record by identifier, which is a read-only query operation with no side effects. The memory system is encrypted and zero-knowledge, limiting exposure even if an agent misuses it by fetching memories it shouldn't access—the severity remains low as no data is modified, deleted, or financial operations are involved.
From the tool's definition Tool name 'fetch' combined with description 'Fetch a specific memory by its ID' indicates a retrieval operation. No modification, deletion, or execution capabilities are described.
Attacks that exploit this kind of access
Fetch a specific memory by its ID. It is categorised as a Read tool in the Memoraeu MCP Server, which means it retrieves data without modifying state.
Register the Memoraeu MCP server in PolicyLayer and add a rule for fetch: 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 Memoraeu. Nothing to install.
fetch 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 fetch 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 fetch. 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.
fetch is provided by the Memoraeu MCP server (pquattro/memoraeu-server). 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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