List top promotion candidates by usage-weighted heuristic score.
AI agents call files_promotable to retrieve information from M3 Memory without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and ranks existing data (promotion candidates) using a scoring algorithm, returning results for inspection. It does not create, modify, delete, or execute operations—it simply retrieves and presents information. The lack of any write, destructive, or execution capability, combined with read-only semantics, clearly places it in the Read category with low severity.
From the tool's definition Tool name 'files_promotable' with description 'List top promotion candidates by usage-weighted heuristic score' performs a retrieval/query operation.
Documented attack patterns abuse exactly the kind of access files_promotable gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and M3 Memory, and nothing reaches the server without passing your rules. This is the rule we recommend for files_promotable:
{
"version": "1",
"default": "deny",
"tools": {
"files_promotable": {}
}
}files_promotable is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List top promotion candidates by usage-weighted heuristic score. It is categorised as a Read tool in the M3 Memory MCP Server, which means it retrieves data without modifying state.
Register the M3 Memory MCP server in PolicyLayer and add a rule for files_promotable: 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 M3 Memory. Nothing to install.
files_promotable 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 files_promotable 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 files_promotable. 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.
files_promotable is provided by the M3 Memory MCP server (skynetcmd/m3-memory). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from M3 Memory, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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43 M3 Memory tools catalogued and risk-classified — across an index of 43,000+ MCP servers.