AI agents use add_servers_to_tenant to create or update resources in Playwright Stealth — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Playwright Stealth environment.
This tool creates or modifies tenant configuration by adding MCP servers, which is a reversible write operation. The blast radius is medium because misconfiguration could grant unintended access to servers, but the operation itself is not destructive or financial. The confidence is slightly below 0.9 because the description lacks implementation details about what validation or safeguards exist.
From the tool's definition Tool name 'add_servers_to_tenant' and description 'Add MCP servers to a tenant' indicate a create/modify operation that adds servers to a tenant configuration.
Documented attack patterns abuse exactly the kind of access add_servers_to_tenant gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Playwright Stealth, and nothing reaches the server without passing your rules. This is the rule we recommend for add_servers_to_tenant:
{
"version": "1",
"default": "deny",
"tools": {
"add_servers_to_tenant": {
"limits": [
{
"counter": "add_servers_to_tenant_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}add_servers_to_tenant 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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Add MCP servers to a tenant. It is categorised as a Write tool in the Playwright Stealth MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Playwright Stealth MCP server in PolicyLayer and add a rule for add_servers_to_tenant: 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 Playwright Stealth. Nothing to install.
add_servers_to_tenant 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 add_servers_to_tenant 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 add_servers_to_tenant. 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.
add_servers_to_tenant is provided by the Playwright Stealth MCP server (pulsemcp/mcp-servers). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Playwright Stealth, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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68 Playwright Stealth tools catalogued and risk-classified — across an index of 43,000+ MCP servers.