Add intelligent tool_choice parameter for MCP tools

Implements smart tool selection based on query content:
- Adds query_needs_tools() function to detect tool-requiring queries
- Sets tool_choice="required" for queries needing GitHub/time/weather/search
- Sets tool_choice="auto" for general conversation
- Adds debug logging for tool choice decisions

This fixes the issue where MCP tools were configured but not being used
because tool_choice defaulted to "auto" and the model opted not to use them.

Query detection keywords include:
- Time/date operations (time, clock, date, now, current)
- Weather queries (weather, temperature, forecast)
- GitHub operations (repo, code, file, commit, PR, issue)
- Search/lookup operations (search, find, get, fetch, retrieve)
- File operations (read, open, check, list, contents)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

scripts/discordbot.py

@@ -80,6 +80,41 @@ async def download_image(url: str) -> str | None:
         print(f"Error downloading image from {url}: {e}")
     return None
 
+def query_needs_tools(message: str) -> bool:
+    """
+    Detect if a query likely needs MCP tool access.
+
+    Returns True if the message contains keywords suggesting the need for:
+    - Real-time data (time, weather, current events)
+    - GitHub operations (repos, code, files, issues, PRs)
+    - Search/lookup operations
+    - File system access
+    """
+    tool_keywords = [
+        # Time-related
+        'time', 'clock', 'date', 'today', 'now', 'current', 'when',
+        # Weather
+        'weather', 'temperature', 'forecast',
+        # GitHub operations
+        'github', 'repo', 'repository', 'repositories', 'code', 'file', 'files',
+        'commit', 'commits', 'branch', 'branches', 'pr', 'pull request',
+        'issue', 'issues', 'merge', 'fork', 'clone',
+        # Search/lookup
+        'search', 'look up', 'find', 'locate', 'get', 'fetch', 'retrieve',
+        'show me', 'tell me about', 'what is', 'how many',
+        # File operations
+        'read', 'open', 'check', 'list', 'contents'
+    ]
+
+    message_lower = message.lower()
+    needs_tools = any(keyword in message_lower for keyword in tool_keywords)
+
+    if DEBUG_LOGGING and needs_tools:
+        matched = [kw for kw in tool_keywords if kw in message_lower]
+        debug_log(f"Query needs tools - matched keywords: {matched}")
+
+    return needs_tools
+
 async def get_available_mcp_servers():
     """Query LiteLLM for available MCP servers (used with Responses API)"""
     try:
@@ -327,6 +362,10 @@ async def get_ai_response(history_messages: List[Dict[str, Any]], user_message:
                 debug_log("No MCP servers found, falling back to standard chat completions")
                 # Fall through to standard chat completions below
             else:
+                # Determine if we should force tool usage based on query content
+                tool_choice_value = "required" if query_needs_tools(user_message) else "auto"
+                debug_log(f"Tool choice mode: {tool_choice_value}")
+
                 # Use Responses API with MCP tools
                 debug_log(f"Calling Responses API with {len(tools_config)} MCP servers")
                 debug_log(f"Input messages: {len(input_messages)} messages")
@@ -335,6 +374,7 @@ async def get_ai_response(history_messages: List[Dict[str, Any]], user_message:
                     model=MODEL_NAME,
                     input=input_messages,
                     tools=tools_config,
+                    tool_choice=tool_choice_value,
                     stream=False
                 )