memory_session_start · Memory- MCP: Risk & Policy

WHAT IT DOES

What memory_session_start does on Memory-MCP

AI agents invoke memory_session_start to trigger actions in Memory-MCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why memory_session_start needs a policy

memory_session_start triggers real processes with real consequences. An agent gone sideways doesn't fire it once — it starts dozens of builds, sends mass notifications, or burns through compute before anyone looks up.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

memory_session_start Rate-limited

memory_session_start stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "memory_session_start": {
      "limits": [
        {
          "counter": "memory_session_start_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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-MCP, so you can run agents against it safely.

FAQ

Questions about memory_session_start

What does the memory_session_start tool do? +

memory_session_start. It is categorised as a Execute tool in the Memory-MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on memory_session_start? +

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

What risk level is memory_session_start? +

memory_session_start is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit memory_session_start? +

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

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

memory_session_start is provided by the Memory- MCP server (wb200/memory-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.