Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool provides period statistics for ONE wallet including PnL, win rate, volume, etc., and explicitly calls it 'The main tool for "how is this trader doing".' This is specific, actionable, and distinguishes it from sibling tools like get_wallet_holdings or get_wallet_history.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.