oakvar_filtersqlite · OakVar MCP Server MCP: Risk & Policy

WHAT IT DOES

What oakvar_filtersqlite does on OakVar MCP Server

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

WHY IT NEEDS A POLICY

Why oakvar_filtersqlite needs a policy

This tool writes/creates a new filtered database file, which is a reversible Write operation. While it operates on potentially sensitive genomic data (high severity due to medical/privacy implications), the tool itself performs data copying and filtering rather than deletion (Destructive), code execution (Execute), or financial operations.

From the tool's definition Tool creates a 'filtered copy' of an OakVar result database—a reversible operation that generates new data derived from existing genomic variant analysis results. The action is 'create' rather than delete/modify in-place.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

oakvar_filtersqlite Rate-limited

oakvar_filtersqlite 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": {
    "oakvar_filtersqlite": {
      "limits": [
        {
          "counter": "oakvar_filtersqlite_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 OakVar MCP Server, so you can run agents against it safely.

FAQ

Questions about oakvar_filtersqlite

What does the oakvar_filtersqlite tool do? +

Create a filtered copy of an OakVar result database. It is categorised as a Write tool in the OakVar 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 oakvar_filtersqlite? +

Register the OakVar MCP Server MCP server in PolicyLayer and add a rule for oakvar_filtersqlite: 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 OakVar MCP Server. Nothing to install.

What risk level is oakvar_filtersqlite? +

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

Can I rate-limit oakvar_filtersqlite? +

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

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

oakvar_filtersqlite is provided by the OakVar MCP Server MCP server (miliyarsh/oakvar-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.