AI agents call list_memory_bank_files to retrieve information from Memory Bank MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries or enumerates files in a Memory Bank repository without modifying, deleting, or executing anything. It is a straightforward read operation similar to a directory listing, matching the 'Read' category definition of retrieving or querying data with no side effects. Severity is low because listing files has minimal blast radius—it cannot cause data loss, execute code, or create obligations.
From the tool's definition Tool name 'list_memory_bank_files' and description 'List Memory Bank files' indicate a retrieval operation with no side effects.
Documented attack patterns abuse exactly the kind of access list_memory_bank_files gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Memory Bank MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for list_memory_bank_files:
{
"version": "1",
"default": "deny",
"tools": {
"list_memory_bank_files": {}
}
}list_memory_bank_files is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List Memory Bank files. It is categorised as a Read tool in the Memory Bank MCP MCP Server, which means it retrieves data without modifying state.
Register the Memory Bank MCP server in PolicyLayer and add a rule for list_memory_bank_files: 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 Memory Bank MCP. Nothing to install.
list_memory_bank_files 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 list_memory_bank_files 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 list_memory_bank_files. 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.
list_memory_bank_files is provided by the Memory Bank MCP server (movibe/memory-bank-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Memory Bank MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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15 Memory Bank MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.