update_project_identity_membership

WHAT IT DOES

What update_project_identity_membership does on Infisical MCP

AI agents use update_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 update_project_identity_membership needs a policy

This tool modifies membership roles and permissions reversibly, qualifying it as Write rather than Execute. However, the severity is high because misconfigured machine identity memberships can grant unintended access to secrets and infrastructure, creating significant privilege escalation or lateral movement risks if an AI agent applies incorrect role assignments.

From the tool's definition Tool description explicitly states 'Update a machine identity's project membership roles' — this modifies existing access control configurations. The server description confirms it exposes tools to 'update...projects, environments, folders, and secrets.'

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_project_identity_membership Rate-limited

update_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": {
    "update_project_identity_membership": {
      "limits": [
        {
          "counter": "update_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 update_project_identity_membership

What does the update_project_identity_membership tool do? +

Update a machine identity's project membership 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 update_project_identity_membership? +

Register the Infisical MCP server in PolicyLayer and add a rule for update_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 update_project_identity_membership? +

update_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 update_project_identity_membership? +

Yes. Add a rate_limit block to the update_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 update_project_identity_membership completely? +

Set action: deny in the PolicyLayer policy for update_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 update_project_identity_membership? +

update_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.