update_entity · SQLite Project Memory MCP: Risk & Policy

WHAT IT DOES

What update_entity does on SQLite Project Memory MCP

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

WHY IT NEEDS A POLICY

Why update_entity needs a policy

This tool creates or modifies data reversibly within the project memory database. Updates can be rolled back via snapshots (create_snapshot is available as a sibling tool) and do not destroy information.

From the tool's definition update_entity description states 'Update an existing entity's top-level state' - a clear modification operation that changes data in the SQLite database.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_entity Rate-limited

update_entity 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": {
    "update_entity": {
      "limits": [
        {
          "counter": "update_entity_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 SQLite Project Memory MCP, so you can run agents against it safely.

FAQ

Questions about update_entity

What does the update_entity tool do? +

Update an existing entity's top-level state. It is categorised as a Write tool in the SQLite Project Memory MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update_entity? +

Register the SQLite Project Memory MCP server in PolicyLayer and add a rule for update_entity: 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 SQLite Project Memory MCP. Nothing to install.

What risk level is update_entity? +

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

Can I rate-limit update_entity? +

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

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

update_entity is provided by the SQLite Project Memory MCP server (webrtcgame/sqlite-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.