compile_brief · Vault Memory MCP: Risk & Policy

WHAT IT DOES

What compile_brief does on Vault Memory

AI agents use compile_brief to create or update resources in Vault Memory — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Vault Memory environment.

WHY IT NEEDS A POLICY

Why compile_brief needs a policy

The tool creates a new document (brief) by aggregating source materials and writing it to a designated location. This is a reversible write operation — it produces a new artifact but does not delete or irreversibly overwrite existing data. The corresponding 'delete_note' sibling tool implies notes/briefs can be removed separately, confirming this action is not inherently destructive.

From the tool's definition 'Compile a brief from caller-supplied source documents and write it to the briefs sink'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

compile_brief Rate-limited

compile_brief stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "compile_brief": {
      "limits": [
        {
          "counter": "compile_brief_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Vault Memory, so you can run agents against it safely.

FAQ

Questions about compile_brief

What does the compile_brief tool do? +

Compile a brief from caller-supplied source documents and write it to the briefs sink. It is categorised as a Write tool in the Vault Memory MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on compile_brief? +

Register the Vault Memory MCP server in PolicyLayer and add a rule for compile_brief: 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 Vault Memory. Nothing to install.

What risk level is compile_brief? +

compile_brief is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit compile_brief? +

Yes. Add a rate_limit block to the compile_brief 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.

How do I block compile_brief completely? +

Set action: deny in the PolicyLayer policy for compile_brief. 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.

What MCP server provides compile_brief? +

compile_brief is provided by the Vault Memory MCP server (owrede/vault-memory). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.