Invite a Crow contact to join your companion room. Generates a room token and sends an encrypted invite via Nostr. The contact receives a notification with a join link.
AI agents use crow_room_invite to create or update resources in Crow — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Crow environment.
This tool creates and modifies data reversibly: it generates an invitation token and establishes a new room invitation relationship. While it involves communication, the primary action is creating a new invitation record and sending a notification. It is not destructive (invitations can be revoked), not financial, and not arbitrary code execution.
From the tool's definition Tool generates a room token and sends an encrypted invite, which creates a new invitation resource and modifies the state of the contacts/rooms system. The description explicitly states it 'Generates a room token and sends an encrypted invite via Nostr.'
Documented attack patterns abuse exactly the kind of access crow_room_invite gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Crow, and nothing reaches the server without passing your rules. This is the rule we recommend for crow_room_invite:
{
"version": "1",
"default": "deny",
"tools": {
"crow_room_invite": {
"limits": [
{
"counter": "crow_room_invite_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}crow_room_invite 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.
Free to start. No card required.
Invite a Crow contact to join your companion room. Generates a room token and sends an encrypted invite via Nostr. The contact receives a notification with a join link. It is categorised as a Write tool in the Crow MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Crow MCP server in PolicyLayer and add a rule for crow_room_invite: 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 Crow. Nothing to install.
crow_room_invite is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the crow_room_invite 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.
Set action: deny in the PolicyLayer policy for crow_room_invite. 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.
crow_room_invite is provided by the Crow MCP server (kh0pper/crow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Crow, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
576 Crow tools catalogued and risk-classified — across an index of 43,000+ MCP servers.