Create a new IAM user. This tool creates a new IAM user in your AWS account. The user will be created without any permissions by default - you'll need to attach policies separately. ## Security Best Practices: - Use descriptive user names that indicate the user's role or purpose - Set appropria...
Accepts file system path (path)
Part of the AWS IAM MCP Server MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents use create_user to create or modify resources in AWS IAM MCP Server. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call create_user repeatedly, creating or modifying resources faster than any human could review. Intercept's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach AWS IAM MCP Server.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
tools:
create_user:
rules:
- action: allow
rate_limit:
max: 30
window: 60See the full AWS IAM MCP Server policy for all 29 tools.
Agents calling write-class tools like create_user have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Write risk category across the catalogue. The same policy patterns (rate-limit, validate) apply to each.
Create a new IAM user. This tool creates a new IAM user in your AWS account. The user will be created without any permissions by default - you'll need to attach policies separately. ## Security Best Practices: - Use descriptive user names that indicate the user's role or purpose - Set appropriate paths for organizational structure - Consider using permissions boundaries to limit maximum permissions - Follow the principle of least privilege when assigning permissions later Args: ctx: MCP context for error reporting user_name: The name of the new IAM user path: The path for the user (default: '/') permissions_boundary: Optional ARN of the permissions boundary policy confirmed: Must be true to confirm this write operation Returns: CreateUserResponse containing the created user details. It is categorised as a Write tool in the AWS IAM MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Add a rule in your Intercept YAML policy under the tools section for create_user. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the AWS IAM MCP Server MCP server.
create_user 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 create_user rule in your Intercept 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 Intercept policy for create_user. 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.
create_user is provided by the AWS IAM MCP Server MCP server (awslabs.iam-mcp-server). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic policy on every MCP tool call. Per-identity grants. Full audit log.