Search memories by semantic similarity. Returns the most relevant memories for a given query.
AI agents call memory_search to retrieve information from Mcp Recall without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves stored memories based on semantic similarity matching. It performs a query operation that returns results without creating, modifying, deleting, or executing external code. The blast radius of misuse is minimal—an agent could only access information already stored in the memory system, with no ability to alter state or trigger external actions.
From the tool's definition Tool description states 'Search memories by semantic similarity. Returns the most relevant memories for a given query.' The verb 'search' and the function of returning data without modifying it are characteristic of read operations.
Attacks that exploit this kind of access
Search memories by semantic similarity. Returns the most relevant memories for a given query. It is categorised as a Read tool in the Mcp Recall MCP Server, which means it retrieves data without modifying state.
Register the Mcp Recall MCP server in PolicyLayer and add a rule for memory_search: 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 Mcp Recall. Nothing to install.
memory_search 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_search 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_search. 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_search is provided by the Mcp Recall MCP server (jensimogit/mcp-recall). 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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