update_lead_fields · Lawruler MCP: Risk & Policy

WHAT IT DOES

What update_lead_fields does on Lawruler

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

WHY IT NEEDS A POLICY

Why update_lead_fields needs a policy

This tool creates or modifies data reversibly by updating lead fields in the LawRuler Legal CRM system. It is clearly a Write operation—it changes existing records but does not delete, execute arbitrary code, or move money.

From the tool's definition Tool name 'update_lead_fields' and description 'Update multiple fields on an existing lead at once' indicate modification of existing data. Accepts custom_fields_json for field updates, which are reversible changes to a CRM record.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_lead_fields Rate-limited

update_lead_fields 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_lead_fields": {
      "limits": [
        {
          "counter": "update_lead_fields_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 Lawruler, so you can run agents against it safely.

FAQ

Questions about update_lead_fields

What does the update_lead_fields tool do? +

Update multiple fields on an existing lead at once. custom_fields_json accepts a JSON object of field_name:value pairs for custom fields. It is categorised as a Write tool in the Lawruler 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_lead_fields? +

Register the Lawruler MCP server in PolicyLayer and add a rule for update_lead_fields: 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 Lawruler. Nothing to install.

What risk level is update_lead_fields? +

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

Can I rate-limit update_lead_fields? +

Yes. Add a rate_limit block to the update_lead_fields 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_lead_fields completely? +

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

update_lead_fields is provided by the Lawruler MCP server (rosenadvertising/lawruler-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.