Tool contracts

Tool names, inputs, and expected outputs.

Tool names (stable)

• fetch_bridge_quotes

• compare_routes

• get_token_price

• analyze_portfolio

• get_chain_info

Output rule

Tool outputs must be deterministic. They must not leak vendor identifiers.

If a tool returns provider metadata internally, strip it at the boundary. Expose only engine_id (X1|X2|X3) and normalized fields.