brief_edit · Llama MCP: Risk & Policy

WHAT IT DOES

What brief_edit does on Llama

AI agents use brief_edit 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 brief_edit needs a policy

This tool modifies data reversibly—editing a brief block can be undone or corrected (as evidenced by sibling tools like brief_history, brief_restore, and brief_restore_version). It does not delete data (Destructive), execute arbitrary code (Execute), create financial obligations (Financial), or merely read data (Read).

From the tool's definition Tool name 'brief_edit' and description 'Edit an existing brief block in place. Pass only the fields you want to change' indicate in-place modification of existing data structures.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

brief_edit Rate-limited

brief_edit 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": {
    "brief_edit": {
      "limits": [
        {
          "counter": "brief_edit_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 brief_edit

What does the brief_edit tool do? +

Edit an existing brief block in place. Pass only the fields you want to change. 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 brief_edit? +

Register the Llama MCP server in PolicyLayer and add a rule for brief_edit: 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 brief_edit? +

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

Can I rate-limit brief_edit? +

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

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

brief_edit 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.