diff --git a/src/google/adk/utils/instructions_utils.py b/src/google/adk/utils/instructions_utils.py
index 1a5fa8dd..505b5cf1 100644
--- a/src/google/adk/utils/instructions_utils.py
+++ b/src/google/adk/utils/instructions_utils.py
@@ -79,16 +79,7 @@ async def inject_session_state(
     return ''.join(result)
 
   async def _replace_match(match) -> str:
-    matched_text = match.group()
-    if matched_text.startswith('{{') and matched_text.endswith('}}'):
-      # Preserve escaped non-placeholder literals (e.g. JSON snippets),
-      # but keep escaped placeholders as literal placeholders.
-      escaped_value = matched_text[2:-2]
-      if _is_escaped_placeholder(escaped_value):
-        return matched_text[1:-1]
-      return matched_text
-
-    var_name = matched_text.lstrip('{').rstrip('}').strip()
+    var_name = match.group().lstrip('{').rstrip('}').strip()
     optional = False
     if var_name.endswith('?'):
       optional = True
@@ -133,21 +124,6 @@ async def inject_session_state(
   return await _async_sub(r'{+[^{}]*}+', _replace_match, template)
 
 
-def _is_escaped_placeholder(value: str) -> bool:
-  """Checks if escaped braces contain a supported placeholder pattern."""
-  var_name = value.strip()
-  if not var_name:
-    return False
-
-  if var_name.endswith('?'):
-    var_name = var_name.removesuffix('?')
-
-  if var_name.startswith('artifact.'):
-    return True
-
-  return _is_valid_state_name(var_name)
-
-
 def _is_valid_state_name(var_name):
   """Checks if the variable name is a valid state name.
 
diff --git a/tests/unittests/utils/test_instructions_utils.py b/tests/unittests/utils/test_instructions_utils.py
index fa4f1ab0..d76e5032 100644
--- a/tests/unittests/utils/test_instructions_utils.py
+++ b/tests/unittests/utils/test_instructions_utils.py
@@ -146,32 +146,6 @@ async def test_inject_session_state_with_invalid_state_name_returns_original():
   assert populated_instruction == "Hello {invalid-key}!"
 
 
-@pytest.mark.asyncio
-async def test_inject_session_state_with_escaped_braces_returns_literal():
-  instruction_template = "Code sample: {{user_name}}. Value: {user_name}."
-  invocation_context = await _create_test_readonly_context(
-      state={"user_name": "Foo"}
-  )
-
-  populated_instruction = await instructions_utils.inject_session_state(
-      instruction_template, invocation_context
-  )
-  assert populated_instruction == "Code sample: {user_name}. Value: Foo."
-
-
-@pytest.mark.asyncio
-async def test_inject_session_state_with_escaped_non_placeholder_keeps_double_braces():
-  instruction_template = "Literal template: {{'key2': 'value2'}}."
-  invocation_context = await _create_test_readonly_context(
-      state={"user_name": "Foo"}
-  )
-
-  populated_instruction = await instructions_utils.inject_session_state(
-      instruction_template, invocation_context
-  )
-  assert populated_instruction == "Literal template: {{'key2': 'value2'}}."
-
-
 @pytest.mark.asyncio
 async def test_inject_session_state_with_invalid_prefix_state_name_returns_original():
   instruction_template = "Hello {invalid:key}!"