claude_desktop_config.json → mcpServers.meta-marketing.env.META_AD_ACCOUNT_ID was set to act_664046922693997 (personal). Should be act_2556180444815953 (Sperry). Memory was wrong — marked it as corrected. Fix requires editing the config file and restarting Claude Desktop.
/Users/Jason/Library/Application Support/Claude/claude_desktop_config.json → change META_AD_ACCOUNT_ID from act_664046922693997 to act_2556180444815953. Restart Claude Desktop.