add_relationship · SQLite Project Memory MCP: Risk & Policy

WHAT IT DOES

What add_relationship does on SQLite Project Memory MCP

AI agents use add_relationship 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 add_relationship needs a policy

This tool creates new relationships (edges) in the project memory graph, which modifies the data structure reversibly. It does not delete, execute arbitrary code, or move financial data. It is a Write operation because it adds new data to the database.

From the tool's definition Tool description states 'Create a typed graph edge between two entities.' The verb 'create' and the action of establishing new relationships in a graph structure indicates data modification.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_relationship Rate-limited

add_relationship 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": {
    "add_relationship": {
      "limits": [
        {
          "counter": "add_relationship_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 add_relationship

What does the add_relationship tool do? +

Create a typed graph edge between two entities. 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 add_relationship? +

Register the SQLite Project Memory MCP server in PolicyLayer and add a rule for add_relationship: 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 add_relationship? +

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

Can I rate-limit add_relationship? +

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

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

add_relationship 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.