Graceful handling of vague/incomplete trade requests

[premiumjibles]

Problem

Vague requests like "sell on every week" cause the agent to either fail with tool errors or hallucinate parameter values. The system prompt has a few narrow clarification rules but no general framework for handling broadly incomplete requests.

tk ticket: sa-xeyj

Root Cause

The system prompt focuses on routing clear intents to tools, not detecting/resolving incomplete intents. No instruction like "if you cannot determine [sell asset, buy asset, amount], ask before calling any tool."

Fix (prompt-only, no tool code changes)

Add a <clarification-rules> section to the system prompt that:

1. Defines minimum required params per intent (swaps: sell/buy/amount; TWAP: sell/buy/amount/duration; etc.)
2. Instructs agent to batch all missing params into one clarifying question
3. Handles common vague patterns with intelligent defaults/suggestions
4. Never fabricates parameter values

Key Files

• apps/agentic-server/src/routes/chat.ts — buildSystemPrompt()

Acceptance Criteria

• Agent asks clarifying questions for "sell on every week"
• Agent asks for missing amount on "buy some ETH"
• Agent batches all missing params into one question
• Clear requests like "swap 1 ETH to USDC" still execute immediately
• Existing specific clarification rules still work