Connects to a new agent server (Mastra, LangGraph, etc.) and adds it to the proxy
AI agents use connectServer to create or update resources in Mcp Agent Proxy — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Agent Proxy environment.
This tool creates a new connection to an external agent server and registers it in the proxy, which is a reversible write/create operation. It modifies the proxy's state by adding a new server entry. Misuse could allow connecting to malicious or unauthorized agent servers, but the action is not inherently destructive or financial.
From the tool's definition Connects to a new agent server... and adds it to the proxy
Documented attack patterns abuse exactly the kind of access connectServer gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Agent Proxy, and nothing reaches the server without passing your rules. This is the rule we recommend for connectServer:
{
"version": "1",
"default": "deny",
"tools": {
"connectServer": {
"limits": [
{
"counter": "connectserver_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}connectServer 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.
Connects to a new agent server (Mastra, LangGraph, etc.) and adds it to the proxy. It is categorised as a Write tool in the Mcp Agent Proxy MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Mcp Agent Proxy MCP server in PolicyLayer and add a rule for connectServer: 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 Mcp Agent Proxy. Nothing to install.
connectServer 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 connectServer 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 connectServer. 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.
connectServer is provided by the Mcp Agent Proxy MCP server (mashh-lab/mcp-agent-proxy). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Mcp Agent Proxy, 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.
5 Mcp Agent Proxy tools catalogued and risk-classified — across an index of 43,000+ MCP servers.