Send a message to another agent. Notes if the recipient is offline.
AI agents use send to create or update resources in CC2CC — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your CC2CC environment.
This tool creates or modifies data reversibly by writing messages to the file-based communication system between Claude Code instances. It is a Write operation rather than Execute because it doesn't run code or trigger external operations—it merely stores a message.
From the tool's definition Tool description states 'Send a message to another agent' - a write operation that creates/modifies data (a message) in a file-based communication system. The tool creates new JSON file entries in the inter-agent communication channels.
Documented attack patterns abuse exactly the kind of access send gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and CC2CC, and nothing reaches the server without passing your rules. This is the rule we recommend for send:
{
"version": "1",
"default": "deny",
"tools": {
"send": {
"limits": [
{
"counter": "send_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}send 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.
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Send a message to another agent. Notes if the recipient is offline. It is categorised as a Write tool in the CC2CC MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the CC2CC MCP server in PolicyLayer and add a rule for send: 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 CC2CC. Nothing to install.
send 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 send 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 send. 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.
send is provided by the CC2CC MCP server (non4me/cc2cc). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from CC2CC, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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7 CC2CC tools catalogued and risk-classified — across an index of 43,000+ MCP servers.