deal_update · Llama MCP: Risk & Policy

WHAT IT DOES

What deal_update does on Llama

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

WHY IT NEEDS A POLICY

Why deal_update needs a policy

The tool creates or modifies data (deal records) in a reversible manner. The update is constrained to whitelisted fields only, limiting but not eliminating risk. It does not delete or destroy data (ruling out Destructive), does not move money directly (ruling out Financial), and does not execute arbitrary code (ruling out Execute).

From the tool's definition Tool name is 'deal_update' and description states 'Update a single whitelisted field on a deal' with writable fields including 'status' and 'theirStage'. This modifies deal records reversibly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

deal_update Rate-limited

deal_update 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": {
    "deal_update": {
      "limits": [
        {
          "counter": "deal_update_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 Llama, so you can run agents against it safely.

FAQ

Questions about deal_update

What does the deal_update tool do? +

Update a single whitelisted field on a deal. Writable fields: status, theirStage,. It is categorised as a Write tool in the Llama MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on deal_update? +

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

What risk level is deal_update? +

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

Can I rate-limit deal_update? +

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

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

deal_update is provided by the Llama MCP server (llama-ventures/llama-cli). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.