update_weak_points · Arvo MCP Server MCP: Risk & Policy

WHAT IT DOES

What update_weak_points does on Arvo MCP Server

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

WHY IT NEEDS A POLICY

Why update_weak_points needs a policy

This tool creates or modifies user data (weak points in their fitness regimen) reversibly within the Arvo fitness system. It does not execute arbitrary code, delete data irreversibly, or move money. The incomplete description lowers confidence slightly, but the name and sibling tools (tracking/coach context) strongly indicate a reversible data modification.

From the tool's definition Tool name 'update_weak_points' and context indicate modification of user fitness data. Description states 'Update the user' which implies a write operation that modifies stored information about the user's fitness profile.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_weak_points Rate-limited

update_weak_points 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_weak_points": {
      "limits": [
        {
          "counter": "update_weak_points_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 Arvo MCP Server, so you can run agents against it safely.

FAQ

Questions about update_weak_points

What does the update_weak_points tool do? +

Update the user. It is categorised as a Write tool in the Arvo MCP 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 update_weak_points? +

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

What risk level is update_weak_points? +

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

Can I rate-limit update_weak_points? +

Yes. Add a rate_limit block to the update_weak_points 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_weak_points completely? +

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

update_weak_points is provided by the Arvo MCP Server MCP server (khaoss85/arvo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.