What do you know?
├─ Keywords/content     → search_documents(query="term1 term2")
├─ Document ID          → get_document(id=N)
├─ By tag               → search_documents(query="tag:tagname")
├─ By type              → search_documents(query="type:typename")
├─ By correspondent     → search_documents(query="correspondent:name")
├─ By date              → search_documents(query="created:[2024 to 2025]")
└─ Combined             → search_documents(query="tag:X correspondent:Y created:[2024 to 2025]")

What operation?
├─ Add tag         → bulk_edit_documents(method="add_tag", tag=ID)
├─ Remove tag      → bulk_edit_documents(method="remove_tag", tag=ID)
├─ Multi-tag       → bulk_edit_documents(method="modify_tags", add_tags=[...], remove_tags=[...])
├─ Set type        → bulk_edit_documents(method="set_document_type", document_type=ID)
├─ Set sender      → bulk_edit_documents(method="set_correspondent", correspondent=ID)
├─ Merge PDFs      → bulk_edit_documents(method="merge", metadata_document_id=ID)
├─ Rotate pages    → bulk_edit_documents(method="rotate", degrees=90|180|270)
├─ Delete pages    → bulk_edit_documents(method="delete_pages", pages="1,3,5-7")
├─ Reprocess OCR   → bulk_edit_documents(method="reprocess")
└─ Delete          → bulk_edit_documents(method="delete")  !! PERMANENT !!

1. Resolve metadata IDs first:
   ├─ list_tags            → find or create_tag
   ├─ list_correspondents  → find or create_correspondent
   └─ list_document_types  → find or create_document_type
2. post_document(file=<base64>, filename="name.pdf", tags=[...], correspondent=ID, ...)

Need to change metadata objects?
├─ View all          → list_tags / list_correspondents / list_document_types
├─ Create new        → create_tag / create_correspondent / create_document_type
├─ Edit tag          → update_tag(id, name, color, match, matching_algorithm)
├─ Delete one tag    → delete_tag(id)
├─ Batch delete/perm → bulk_edit_tags / bulk_edit_correspondents / bulk_edit_document_types