promote_memory · Memory Bridge MCP: Risk & Policy

WHAT IT DOES

What promote_memory does on Memory Bridge

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

WHY IT NEEDS A POLICY

Why promote_memory needs a policy

The tool operates on a shared memory system and the name 'promote' suggests elevating or modifying the status/priority of stored memories—a reversible write operation. Given the shared cross-project context, misuse could affect memory visibility or priority across projects, but effects are likely reversible (hence not Destructive).

From the tool's definition Tool name 'promote_memory' combined with server context (memory sharing/management) indicates modification of memory state. Description is empty, limiting certainty.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

promote_memory Rate-limited

promote_memory 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": {
    "promote_memory": {
      "limits": [
        {
          "counter": "promote_memory_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 Memory Bridge, so you can run agents against it safely.

FAQ

Questions about promote_memory

What does the promote_memory tool do? +

promote_memory. It is categorised as a Write tool in the Memory Bridge MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on promote_memory? +

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

What risk level is promote_memory? +

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

Can I rate-limit promote_memory? +

Yes. Add a rate_limit block to the promote_memory 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 promote_memory completely? +

Set action: deny in the PolicyLayer policy for promote_memory. 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 promote_memory? +

promote_memory is provided by the Memory Bridge MCP server (lewenw/claude-memory-bridge). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.