The cursor rule added by the MCP setup prompt has been updated to call semgrep_scan instead of security_check. We have also removed the security_check tool. We should update the cursor rule here to match.

Test plan: the cursor rule added should say semgrep_scan instead.

PR checklist:

• Purpose of the code is evident to future readers
• Tests included or PR comment includes a reproducible test plan
• Documentation is up-to-date
• A changelog entry was for any user-facing change
• Change has no security implications (otherwise, ping security team)

If you're unsure about any of this, please see:

• Contribution guidelines!
• One of the more specific guides located here