create_or_update_alias

Create or update identity aliases for a user identified by alias. The `onesignal_id` alias is read-only and must not be included.

Part of the OneSignal MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.

onesignal/onesignal Write

// WHEN AI AGENTS USE THIS TOOL

AI agents use create_or_update_alias to create or modify resources in OneSignal. 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.

// WHY ENFORCE A POLICY ON CREATE_OR_UPDATE_ALIAS

Without a policy, an AI agent could call create_or_update_alias 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 OneSignal.

// RECOMMENDED POLICY

Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.

onesignal-onesignal.yaml

tools:
  create_or_update_alias:
    rules:
      - action: allow
        rate_limit:
          max: 30
          window: 60

See the full OneSignal policy for all 31 tools.

// DETAILS

Tool Name create_or_update_alias

Category Write

MCP Server OneSignal MCP Server

Risk Level Medium

// MORE ONESIGNAL TOOLS

Financial transfer_subscription Execute start_live_activity Write create_alias_by_subscription Write create_segment Write create_subscription Write create_template Write create_user Write export_audience_activity_csv

View all 31 tools →

// WHAT CAN GO WRONG

Agents calling write-class tools like create_or_update_alias have been implicated in these attack patterns. Read the full case and prevention policy for each:

Browse the full MCP Attack Database →

// OTHER WRITE TOOLS ACROSS MCP SERVERS

Other tools in the Write risk category across the catalogue. The same policy patterns (rate-limit, validate) apply to each.

Firecrawl Web Scraping Server firecrawl_generate_llmstxt AbraFlexi contact_create AbraFlexi contact_update AbraFlexi evidence_create AbraFlexi evidence_update AbraFlexi invoice_issued_update

// RELATED READING

// FAQ

What does the create_or_update_alias tool do? +

Create or update identity aliases for a user identified by alias. The `onesignal_id` alias is read-only and must not be included.. It is categorised as a Write tool in the OneSignal 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_or_update_alias? +

Add a rule in your Intercept YAML policy under the tools section for create_or_update_alias. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the OneSignal MCP server.

What risk level is create_or_update_alias? +

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

Can I rate-limit create_or_update_alias? +

Yes. Add a rate_limit block to the create_or_update_alias 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.

How do I block create_or_update_alias completely? +

Set action: deny in the Intercept policy for create_or_update_alias. 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_or_update_alias? +

create_or_update_alias is provided by the OneSignal MCP server (onesignal/onesignal). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.

create_or_update_alias

Let agents act without letting them run wild.