ultrabrain_update · Ultrabrain MCP: Risk & Policy

WHAT IT DOES

What ultrabrain_update does on Ultrabrain

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

WHY IT NEEDS A POLICY

Why ultrabrain_update needs a policy

This tool modifies existing data (thoughts and their associated metadata) within a local reasoning system, but cannot delete or irreversibly overwrite data, nor does it execute external code or trigger side effects. The update is scoped to internal thought records and quality metrics tracking, making it reversible and non-destructive.

From the tool's definition The tool explicitly 'Update an existing thought with stronger evidence, confidence, risks, actions, or quality metrics' — a modification operation on internal reasoning state.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

ultrabrain_update Rate-limited

ultrabrain_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": {
    "ultrabrain_update": {
      "limits": [
        {
          "counter": "ultrabrain_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 Ultrabrain, so you can run agents against it safely.

FAQ

Questions about ultrabrain_update

What does the ultrabrain_update tool do? +

Update an existing thought with stronger evidence, confidence, risks, actions, or quality metrics. It is categorised as a Write tool in the Ultrabrain MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on ultrabrain_update? +

Register the Ultrabrain MCP server in PolicyLayer and add a rule for ultrabrain_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 Ultrabrain. Nothing to install.

What risk level is ultrabrain_update? +

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

Can I rate-limit ultrabrain_update? +

Yes. Add a rate_limit block to the ultrabrain_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 ultrabrain_update completely? +

Set action: deny in the PolicyLayer policy for ultrabrain_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 ultrabrain_update? +

ultrabrain_update is provided by the Ultrabrain MCP server (lcv-ideas-software/ultrabrain-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.