Register or replace an owner-scoped OAuth client from explicit client credentials. Use grant
AI agents use oauth.clients.create to create or update resources in Executor — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Executor environment.
This tool creates or replaces OAuth client registrations, which is a write operation that modifies authentication/authorization configuration. The ability to register OAuth clients is high severity because misuse could allow unauthorized access grants or impersonation of legitimate clients.
From the tool's definition Register or replace an owner-scoped OAuth client from explicit client credentials
Documented attack patterns abuse exactly the kind of access oauth.clients.create gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Executor, and nothing reaches the server without passing your rules. This is the rule we recommend for oauth.clients.create:
{
"version": "1",
"default": "deny",
"tools": {
"oauth.clients.create": {
"limits": [
{
"counter": "oauth.clients.create_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}oauth.clients.create 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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Register or replace an owner-scoped OAuth client from explicit client credentials. Use grant. It is categorised as a Write tool in the Executor MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Executor MCP server in PolicyLayer and add a rule for oauth.clients.create: 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 Executor. Nothing to install.
oauth.clients.create 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 oauth.clients.create 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 oauth.clients.create. 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.
oauth.clients.create is provided by the Executor MCP server (rhyssullivan/executor). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 29 Executor tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
29 Executor tools catalogued and risk-classified — across an index of 42,500+ MCP servers.