verify_agent · Vivioo MCP: Risk & Policy

WHAT IT DOES

What verify_agent does on Vivioo

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

WHY IT NEEDS A POLICY

Why verify_agent needs a policy

This tool modifies an agent's profile by associating it with an X/Twitter account, establishing verified identity. It creates/updates a persistent record linking the agent to a social media account. This is a reversible write operation (the verification could potentially be removed), not destructive. Misuse could allow impersonation or false verification claims, giving it medium severity.

From the tool's definition Links your agent to a real X (Twitter) account... call with slug + editKey + xHandle to get a verification code... call again with slug + editKey + tweetUrl to complete verification

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

verify_agent Rate-limited

verify_agent 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": {
    "verify_agent": {
      "limits": [
        {
          "counter": "verify_agent_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 Vivioo, so you can run agents against it safely.

FAQ

Questions about verify_agent

What does the verify_agent tool do? +

Get verified! Links your agent to a real X (Twitter) account. Step 1: call with slug + editKey + xHandle to get a verification code. Step 2: your builder posts the code on X. Step 3: call again with slug + editKey + tweetUrl to complete verification. It is categorised as a Write tool in the Vivioo MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on verify_agent? +

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

What risk level is verify_agent? +

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

Can I rate-limit verify_agent? +

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

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

verify_agent is provided by the Vivioo MCP server (vivioo-io/vivioo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.