diff --git a/tools/extract_function/extract_function.py b/tools/extract_function/extract_function.py
index 20cd6fc6..8a82ebbe 100644
--- a/tools/extract_function/extract_function.py
+++ b/tools/extract_function/extract_function.py
@@ -19,6 +19,7 @@
 if function_header.endswith(';'):
     function_header = function_header[:-1]
 
+# Extract the function name from the function header argument.
 left_parentheses_index = function_header.find('(')
 if left_parentheses_index >= 0:
     function_name = function_header[function_header.rfind(' ', None, left_parentheses_index) + 1 : left_parentheses_index]
@@ -56,6 +57,7 @@
 def get_line_address(line: str):
     return line[line.index(ADDRESS_FIND) + len(ADDRESS_FIND) : -1]
 
+# Find the start and end of the function within the ASM file.
 for i, line in enumerate(original_lines):
     if first_function_start_line is None and line.startswith(ARM_FUNC_START):
         first_function_start_line = i
@@ -63,7 +65,7 @@ def get_line_address(line: str):
         function_start_line = i
     elif line.strip() == f'arm_func_end {function_name}'.strip():
         function_end_line = i
-    
+
     if function_start_line is not None and extract_function_address is None and ADDRESS_FIND in line:
         extract_function_address = get_line_address(line)
     if function_end_line is not None and ADDRESS_FIND in line:
@@ -93,6 +95,7 @@ def get_line_address(line: str):
 
 extract_file_name = f'{file_prefix}{extract_function_address}'
 
+# If needed, add the extracted function's new .o file to main.lsf.
 merge_prev_file = None
 merge_next_file = None
 SRC_LSF_PREFIX = '\tObject src/'
@@ -112,12 +115,15 @@ def get_line_address(line: str):
         if include_new_asm_file:
             lsf_lines[i] += f'\tObject asm/{file_prefix}{new_file_address}.o\n'
         break
-    
+
 BRANCH_LINK_INSTRUCTION = '\tbl '
 BRANCH_LINK_EXCHANGE_INSTRUCTION = '\tblx '
 BRANCH_INSTRUCTION = '\tb '
 WORD_KEY = '.word '
 WORD_PLUS_OFFSET = ' + 0x'
+"""
+Searches through an ASM file's contents for all external symbosl, then populates a .inc file with all the necessary .public definitions.
+"""
 def write_inc_file(lines: List[str], file_path: str):
     defined_functions = set()
     used_functions = set()
@@ -189,6 +195,9 @@ def write_inc_file(lines: List[str], file_path: str):
 
 }}"""
 
+# Add the extracted function to a .h and .c file.
+# If there is an existing C file adjacent to the extracted function, add the function to that file.
+# Otherwise, make a new set of files.
 if merge_prev_file:
     header_file_path = os.path.join(HEADER_FOLDER, f'{merge_prev_file}.h')
     with open(header_file_path, 'r') as header_file:
diff --git a/tools/sync_pmdsky_debug/pmdsky_debug_reader.py b/tools/sync_pmdsky_debug/pmdsky_debug_reader.py
index 9ab5f50a..d54ddbd5 100644
--- a/tools/sync_pmdsky_debug/pmdsky_debug_reader.py
+++ b/tools/sync_pmdsky_debug/pmdsky_debug_reader.py
@@ -21,6 +21,9 @@
     'GAME_STATE_VALUES',
 ])
 
+"""
+Returns the file path where pmdsky-debug is located locally, defined within pmdsky_debug_location.txt.
+"""
 def get_pmdsky_debug_location() -> str:
     global pmdsky_debug_path
     if not pmdsky_debug_path:
diff --git a/tools/sync_pmdsky_debug/symbol_details.py b/tools/sync_pmdsky_debug/symbol_details.py
index 8bb96a61..b520acd0 100644
--- a/tools/sync_pmdsky_debug/symbol_details.py
+++ b/tools/sync_pmdsky_debug/symbol_details.py
@@ -1,5 +1,7 @@
 from dataclasses import dataclass
 
+# Some symbol names in the decomp do not match pmdsky-debug because of naming convention differences.
+# Map these symbol names between the two projects to avoid changes when syncing the projects.
 MIXED_CASE_SYMBOLS_ARM9 = {
     '_secure': 'SECURE',
     '_start_AutoloadDoneCallback': 'StartAutoloadDoneCallback',
diff --git a/tools/sync_pmdsky_debug/sync_from_pmdsky_debug.py b/tools/sync_pmdsky_debug/sync_from_pmdsky_debug.py
index bbb11566..199b0a5e 100644
--- a/tools/sync_pmdsky_debug/sync_from_pmdsky_debug.py
+++ b/tools/sync_pmdsky_debug/sync_from_pmdsky_debug.py
@@ -16,6 +16,9 @@
 xmap_symbols = read_xmap_symbols()
 
 asm_files = []
+"""
+Searches for all files within a directory that have certain extensions.
+"""
 def add_files_with_extensions(folder: str, extensions: List[str]) -> List[str]:
     found_files = []
     for root, _, files in os.walk(folder):
@@ -57,6 +60,8 @@ def add_files_with_extensions(folder: str, extensions: List[str]) -> List[str]:
 
                 print(f'Replacing {old_symbol.name} with {symbol.name}')
                 replaced_symbols.add(old_symbol.name)
+
+                # Replace symbol occurrences in ASM files.
                 if symbol.is_data:
                     asm_search_string_bases = [
                         f'\n{old_symbol.name}:\n',
@@ -100,6 +105,7 @@ def add_files_with_extensions(folder: str, extensions: List[str]) -> List[str]:
                     with open(file_path, 'w') as asm_file:
                         asm_file.write(asm_contents)
 
+                # Replace symbol occurrences in C files.
                 src_search_string_data_regex = re.compile(fr'([ &*(]){old_symbol.name}([,); [])')
                 src_search_string_data_regex_replace = fr'\1{symbol.name}\2'
 
diff --git a/tools/sync_pmdsky_debug/sync_to_pmdsky_debug.py b/tools/sync_pmdsky_debug/sync_to_pmdsky_debug.py
index 38ce2481..7944b6c7 100644
--- a/tools/sync_pmdsky_debug/sync_to_pmdsky_debug.py
+++ b/tools/sync_pmdsky_debug/sync_to_pmdsky_debug.py
@@ -27,6 +27,11 @@ def get_base_symbol_name(symbol_name: str) -> str:
         return symbol_name[:symbol.name.find('__')]
     return symbol_name
 
+def read_symbol_array(symbol_path: str, symbol_type_key: str, yaml_manager: YamlManager) -> List[Any]:
+    symbols_yaml_outer: Dict[str, Any] = yaml_manager.read_yaml(symbol_path)
+    symbols_yaml: Dict[str, Any] = symbols_yaml_outer[list(symbols_yaml_outer.keys())[0]]
+    return symbols_yaml[symbol_type_key]
+
 def sync_xmap_symbol(address: int, symbol: SymbolDetails, language: str, yaml_manager: YamlManager):
     if default_symbol_name.match(symbol.name):
         return
@@ -48,27 +53,6 @@ def sync_xmap_symbol(address: int, symbol: SymbolDetails, language: str, yaml_ma
         wram_address = address
         address -= WRAM_OFFSET
 
-    if address in pmdsky_debug_section:
-        # If the address is already defined in pmdsky-debug, replace the old symbol name with the new one in the YAML and header files.
-        old_symbol = pmdsky_debug_section[address]
-        base_old_symbol_name = get_base_symbol_name(old_symbol.name)
-        if base_old_symbol_name != base_symbol_name:
-            yaml_manager.write_yaml()
-            print(f'Replacing {base_old_symbol_name} with {base_symbol_name}')
-            with open(old_symbol.file_path, 'r') as symbols_file:
-                symbol_contents = symbols_file.read()
-            symbol_contents = symbol_contents.replace(f'name: {base_old_symbol_name}\n', f'name: {base_symbol_name}\n')
-            with open(old_symbol.file_path, 'w') as symbol_file:
-                symbol_file.write(symbol_contents)
-
-            header_path = old_symbol.file_path.replace(SYMBOLS_FOLDER, os.path.join('headers', 'functions')).replace('.yml', '.h')
-            with open(header_path, 'r') as header_file:
-                header_contents = header_file.read()
-            header_contents = header_contents.replace(f' {base_old_symbol_name}(', f' {base_symbol_name}(')
-            with open(header_path, 'w') as header_file:
-                header_file.write(header_contents)
-        return
-
     path_prefix = os.path.join(pmdsky_debug_location, SYMBOLS_FOLDER)
     if base_symbol_name in symbol_file_paths:
         symbol_path = symbol_file_paths[base_symbol_name]
@@ -85,19 +69,43 @@ def sync_xmap_symbol(address: int, symbol: SymbolDetails, language: str, yaml_ma
 
         symbol_path = os.path.join(path_prefix, base_symbol_path)
 
-    symbols_yaml_outer: Dict[str, Any] = yaml_manager.read_yaml(symbol_path)
-
-    symbols_yaml: Dict[str, Any] = symbols_yaml_outer[list(symbols_yaml_outer.keys())[0]]
-
     if symbol.is_data:
         symbol_type_key = 'data'
     else:
         symbol_type_key = 'functions'
-    symbol_array: List[Any] = symbols_yaml[symbol_type_key]
+
+    if address in pmdsky_debug_section:
+        # If the address is already defined in pmdsky-debug, replace the old symbol name with the new one in the YAML and header files.
+        old_symbol = pmdsky_debug_section[address]
+        base_old_symbol_name = get_base_symbol_name(old_symbol.name)
+        if base_old_symbol_name != base_symbol_name:
+            print(f'Replacing {base_old_symbol_name} with {base_symbol_name}')
+            symbol_array = read_symbol_array(symbol_path, symbol_type_key, yaml_manager)
+            for yaml_symbol in symbol_array:
+                if yaml_symbol['name'] == base_old_symbol_name:
+                    yaml_symbol['name'] = base_symbol_name
+                    break
+
+            header_path = old_symbol.file_path.replace(SYMBOLS_FOLDER, os.path.join('headers', symbol_type_key)).replace('.yml', '.h')
+            with open(header_path, 'r') as header_file:
+                header_contents = header_file.read()
+
+            if symbol.is_data:
+                # Match data symbols by looking for either the end-of-line semicolon or array start bracket.
+                header_contents = re.sub(fr' {base_old_symbol_name}([\[;])', fr' {base_symbol_name}\1', header_contents)
+            else:
+                # Match function symbols by looking for the open parentheses syntax.
+                header_contents = header_contents.replace(f' {base_old_symbol_name}(', f' {base_symbol_name}(')
+
+            with open(header_path, 'w') as header_file:
+                header_file.write(header_contents)
+        return
 
     matching_symbol_entry = None
     symbol_before = None
 
+    symbol_array = read_symbol_array(symbol_path, symbol_type_key, yaml_manager)
+
     # Find the existing symbol and replace its address, or make a new one if it isn't there.
     symbol_preexisting = False
     insert_index = None
@@ -138,6 +146,7 @@ def sync_xmap_symbol(address: int, symbol: SymbolDetails, language: str, yaml_ma
     symbol_entry_addresses: int | List[int] = symbol_entry_language_addresses[language_key]
 
 
+    # If needed, reorder language addresses within the YAML for consistency with existing pmdsky-debug entries.
     hex_address = HexCapsInt(address)
     reorder_languages = language_key == 'EU' and len(symbol_entry_language_addresses) > 1 and not symbol_entry_language_addresses[language_key]
     if multiple_symbol_suffix.search(symbol.name):
@@ -162,15 +171,18 @@ def sync_xmap_symbol(address: int, symbol: SymbolDetails, language: str, yaml_ma
     if symbol_preexisting:
         return
 
+    # Add the symbol to the correspond header file.
     base_symbol_path = base_symbol_path.replace('.yml', '.h')
     header_path = symbol_path.replace(SYMBOLS_FOLDER, os.path.join('headers', symbol_type_key)).replace('.yml', '.h')
     with open(header_path, 'r') as header_file:
         header_contents = header_file.readlines()
 
+    # Look for the symbol that was immediately before the new symbol in the YAML.
+    # The new symbol will be added directly after this anchor symbol.
     target_line = None
     if symbol_before is not None:
         for i, line in enumerate(header_contents):
-            if symbol.is_data and re.search(fr' {symbol_before}[[;]', line) or not symbol.is_data and f' {symbol_before}(' in line:
+            if symbol.is_data and re.search(fr' {symbol_before}[\[;]', line) or not symbol.is_data and f' {symbol_before}(' in line:
                 target_line = i
                 break
         if target_line is None:
@@ -222,6 +234,7 @@ def sync_xmap_symbol(address: int, symbol: SymbolDetails, language: str, yaml_ma
             if f' {base_symbol_name}(' in line:
                 symbol_header = line
                 break
+        # Match the typedefs used in pmdsky-debug.
         symbol_header = symbol_header.replace('u32', 'uint32_t')
         symbol_header = symbol_header.replace('u16', 'uint16_t')
         symbol_header = symbol_header.replace('u8', 'uint8_t')