contacts_create_or_update · AIOS Co-Founder MCP

WHAT IT DOES

What contacts_create_or_update does on AIOS Co-Founder MCP

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

WHY IT NEEDS A POLICY

Why contacts_create_or_update needs a policy

This tool falls into the Write category because it creates or updates contact records, which are data modifications. The reversible nature (updates can be corrected, contacts can be deleted later) distinguishes it from Destructive actions.

From the tool's definition Tool explicitly performs "Create or update a contact" — these are reversible write operations that modify data in the contacts system. The description confirms it modifies contact data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

contacts_create_or_update Rate-limited

contacts_create_or_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": {
    "contacts_create_or_update": {
      "limits": [
        {
          "counter": "contacts_create_or_update_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches AIOS Co-Founder MCP, so you can run agents against it safely.

FAQ

Questions about contacts_create_or_update

What does the contacts_create_or_update tool do? +

Create or update a contact (requires approval). It is categorised as a Write tool in the AIOS Co-Founder MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on contacts_create_or_update? +

Register the AIOS Co-Founder MCP server in PolicyLayer and add a rule for contacts_create_or_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 AIOS Co-Founder MCP. Nothing to install.

What risk level is contacts_create_or_update? +

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

Can I rate-limit contacts_create_or_update? +

Yes. Add a rate_limit block to the contacts_create_or_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 contacts_create_or_update completely? +

Set action: deny in the PolicyLayer policy for contacts_create_or_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 contacts_create_or_update? +

contacts_create_or_update is provided by the AIOS Co-Founder MCP server (varun-b-nagaraj/python-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.