sequential-thinking-mcp

import logging from typing import Any from fastmcp import FastMCP logger = logging.getLogger("SequentialThinking") mcp: FastMCP[Any] = FastMCP("Sequential Thinking") @mcp.tool() def think( thread_purpose: str, thought: str, thought_index: int, tool_recommendation: str | None = "None", left_to_be_done: str | None = "None", ) -> str: """Logs a thought step for agentic problem-solving, tracking reasoning, tools, and future plans. Start a new thread for each user message. # Capabilities - Workflow Orchestration: Breaks complex tasks into manageable steps. - Iterative Refinement: Self-corrects based on new info or errors. - Tool Recommendation: Suggests specific tools for the next action. - Forward Planning: Tracks remaining tasks via `left_to_be_done`. Args: thread_purpose: Short objective/topic for the thread. thought: Current reasoning or action description. thought_index: Monotonically increasing step number (1, 2, 3...). tool_recommendation: Tool to call next, or 'None'. left_to_be_done: Remaining steps/sub-goals, or 'None'. Returns: Confirmation of log. # Example 1) User: "I keep hearing about central banks, but I don't understand what they are and how they work." 2) think( thread_purpose="Explain Central Banks", thought="The user needs a comprehensive explanation of central banks. I need to identify their core definition, key roles (monetary policy, financial stability, currency issuance), and operational mechanisms (interest rates, reserves). I should search for a structured overview to ensure I don't miss major aspects like the Federal Reserve or ECB as examples.", thought_index=1, tool_recommendation="search_web", left_to_be_done="1. Search for 'how central banks work' and key functions. 2. Synthesize findings into a clear explanation. 3. Create a visual graph of the banking system structure if possible. 4. Present final answer." ) 3) call search_web(query="how central banks work and their main functions") 4) think( thread_purpose="Explain Central Banks", thought="Search results clarify that central banks manage currency stability, control inflation via interest rates, and act as lenders of last resort. I have enough textual information. Now, to make this easier to understand, I should create a graph representing the flow of money and influence between the central bank, commercial banks, and the economy.", thought_index=2, tool_recommendation="create_graph", left_to_be_done="Create a graph showing Central Bank -> Commercial Banks -> Public/Economy relations." ) 5) call create_graph(data=...) 6) Final Response: "Here is an explanation of central banks..." (Task complete, no further think call needed). """ log = f"Thread purpose: {thread_purpose}\nThought {thought_index} logged." if tool_recommendation and tool_recommendation.lower() != "none": log += f" Recommended tool: {tool_recommendation}." extra_log = f"{log}\nThought: {thought}" if left_to_be_done and left_to_be_done.lower() != "none": extra_log += f"\nNext: {left_to_be_done}" logger.info(extra_log) return log