validate · LocuSync Server MCP: Risk & Policy

WHAT IT DOES

What validate does on LocuSync Server

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

WHY IT NEEDS A POLICY

Why validate needs a policy

The tool performs a read operation to check validity, but also includes an automatic fix/repair step if the geometry is found invalid. This mutation of geometry data places it in the Write category. Severity is medium because fixing geometry could alter spatial data in ways that may be difficult to detect or reverse, though it's not irreversible destruction.

From the tool's definition 'Validate a geometry and fix it if invalid' — the tool both reads (validates) and potentially modifies (fixes) geometry data

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

validate Rate-limited

validate 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": {
    "validate": {
      "limits": [
        {
          "counter": "validate_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 LocuSync Server, so you can run agents against it safely.

FAQ

Questions about validate

What does the validate tool do? +

Validate a geometry and fix it if invalid. It is categorised as a Write tool in the LocuSync 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 validate? +

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

What risk level is validate? +

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

Can I rate-limit validate? +

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

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

validate is provided by the LocuSync Server MCP server (matbel91765/gis-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.