memory_add · Semantic Mesh Memory (SEM) MCP Server MCP

WHAT IT DOES

What memory_add does on Semantic Mesh Memory (SEM) MCP Server

AI agents use memory_add to create or update resources in Semantic Mesh Memory (SEM) MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Semantic Mesh Memory (SEM) MCP Server environment.

WHY IT NEEDS A POLICY

Why memory_add needs a policy

This is a Write operation because it creates or modifies data (beliefs) in the semantic memory layer. However, it is reversible through the sibling tool 'memory_forget', and the modifications are to an internal belief representation rather than external systems.

From the tool's definition Tool description states 'Add a belief to memory' which is a create operation that modifies the agent's belief state.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

memory_add Rate-limited

memory_add 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": {
    "memory_add": {
      "limits": [
        {
          "counter": "memory_add_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 Semantic Mesh Memory (SEM) MCP Server, so you can run agents against it safely.

FAQ

Questions about memory_add

What does the memory_add tool do? +

Add a belief to memory. Returns auto-linked related beliefs and potential contradictions. It is categorised as a Write tool in the Semantic Mesh Memory (SEM) MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on memory_add? +

Register the Semantic Mesh Memory (SEM) MCP Server MCP server in PolicyLayer and add a rule for memory_add: 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 Semantic Mesh Memory (SEM) MCP Server. Nothing to install.

What risk level is memory_add? +

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

Can I rate-limit memory_add? +

Yes. Add a rate_limit block to the memory_add 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_add completely? +

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

memory_add is provided by the Semantic Mesh Memory (SEM) MCP Server MCP server (jordancoin/sem-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.