create_project_identity_membership

WHAT IT DOES

What create_project_identity_membership does on Infisical MCP

AI agents use create_project_identity_membership to create or update resources in Infisical MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Infisical MCP environment.

WHY IT NEEDS A POLICY

Why create_project_identity_membership needs a policy

This tool creates a new project membership for a machine identity, which modifies authorization state by assigning roles. While this affects security posture and access control, it is a Write operation because: (1) it creates/adds a new membership record reversibly, (2) the assignment can be updated or removed later without data loss, and (3) it does not delete data or execute arbitrary code.

From the tool's definition Tool name contains 'create' and description states 'Create a machine identity project membership with assigned roles.' This is a reversible creation operation that modifies access control state.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_project_identity_membership Rate-limited

create_project_identity_membership 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_project_identity_membership": {
      "limits": [
        {
          "counter": "create_project_identity_membership_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Infisical MCP, so you can run agents against it safely.

FAQ

Questions about create_project_identity_membership

What does the create_project_identity_membership tool do? +

Create a machine identity project membership with assigned roles. It is categorised as a Write tool in the Infisical MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_project_identity_membership? +

Register the Infisical MCP server in PolicyLayer and add a rule for create_project_identity_membership: 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 Infisical MCP. Nothing to install.

What risk level is create_project_identity_membership? +

create_project_identity_membership is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_project_identity_membership? +

Yes. Add a rate_limit block to the create_project_identity_membership 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.

How do I block create_project_identity_membership completely? +

Set action: deny in the PolicyLayer policy for create_project_identity_membership. 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.

What MCP server provides create_project_identity_membership? +

create_project_identity_membership is provided by the Infisical MCP server (plgonzalezrx8/infisicalmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.