Document MCP Server

Instructions

Implementation Reference

• mcp_server.py:33-42 (handler)

  The edit_document function that executes the tool logic. It takes doc_id, old_str, and new_str parameters, validates the document exists, performs string replacement on the document content, and returns the updated content.

  def edit_document(
      doc_id: str = Field(description="Id of the document that will be edited"),
      old_str: str = Field(description="The text to replace. Must match exactly, including whitespace."),
      new_str: str = Field(description="The new text to insert in place of the old text.")
  ):
      if doc_id not in docs:
          raise ValueError(f"Doc with id {doc_id} not found")
      
      docs[doc_id] = docs[doc_id].replace(old_str, new_str)
      return docs[doc_id]

• mcp_server.py:29-32 (registration)

  Registration of the edit_document tool using the @mcp.tool decorator with name='edit_document' and description.

  @mcp.tool(
      name="edit_document",
      description="Edit a document by replacing a string in the documents content with a new string."
  )

• mcp_server.py:34-36 (schema)

  Input schema definitions using Pydantic Field() for the three parameters: doc_id (document to edit), old_str (text to replace), and new_str (replacement text), each with descriptive metadata.

  doc_id: str = Field(description="Id of the document that will be edited"),
  old_str: str = Field(description="The text to replace. Must match exactly, including whitespace."),
  new_str: str = Field(description="The new text to insert in place of the old text.")