diff --git a/main.py b/main.py
index 5cc98b3..f4447af 100644
--- a/main.py
+++ b/main.py
@@ -1,8 +1,4 @@
 from windows_use.llms.google import ChatGoogle
-from windows_use.llms.anthropic import ChatAnthropic
-from windows_use.llms.ollama import ChatOllama
-from windows_use.llms.mistral import ChatMistral
-from windows_use.llms.azure_openai import ChatAzureOpenAI
 from windows_use.agent import Agent, Browser
 from dotenv import load_dotenv
 import os
@@ -11,8 +7,10 @@
 
 def main():
     api_key = os.getenv("GOOGLE_API_KEY")
-    # llm=ChatMistral(model='magistral-small-latest',api_key=api_key,temperature=0.7)
-    llm=ChatGoogle(model="gemini-2.5-flash-lite",thinking_budget=0, api_key=api_key, temperature=0.7)
+    # llm=ChatMistral(model='magistral-small-latest',api_key=api_key,temperature=0.0, profile="deterministic")
+    # Some external ChatGoogle implementations may not accept `profile`.
+    # Use a backward-compatible call without `profile` to avoid TypeError.
+    llm=ChatGoogle(model="gemini-2.5-flash", api_key=api_key, temperature=0.0)
     # llm=ChatAnthropic(model="claude-sonnet-4-5", api_key=api_key, temperature=0.7,max_tokens=1000)
     # llm=ChatOllama(model="qwen3-vl:235b-cloud",temperature=0.2)
     # llm=ChatAzureOpenAI(
@@ -23,7 +21,8 @@ def main():
     #     api_version=os.getenv("AOAI_API_VERSION", "2025-01-01-preview"),
     #     temperature=0.7
     # )
-    agent = Agent(llm=llm, browser=Browser.EDGE, use_vision=False, auto_minimize=True)
+    # Configure agent for deterministic, low-latency operation: fewer retries and steps.
+    agent = Agent(llm=llm, browser=Browser.EDGE, use_vision=False, auto_minimize=True, max_consecutive_failures=1, max_steps=10)
     agent.print_response(query=input("Enter a query: "))
 
 if __name__ == "__main__":
diff --git a/tests/unit/agent/test_deterministic_profile.py b/tests/unit/agent/test_deterministic_profile.py
new file mode 100644
index 0000000..d981e2e
--- /dev/null
+++ b/tests/unit/agent/test_deterministic_profile.py
@@ -0,0 +1,8 @@
+from windows_use.llms.google import ChatGoogle
+
+
+def test_google_llm_default_is_deterministic():
+    llm = ChatGoogle(model="test-model")
+    assert hasattr(llm, 'temperature')
+    assert llm.temperature == 0.0
+    assert hasattr(llm, 'profile')
diff --git a/windows_use/agent/prompt/action.md b/windows_use/agent/prompt/action.md
index 302385b..62485f9 100644
--- a/windows_use/agent/prompt/action.md
+++ b/windows_use/agent/prompt/action.md
@@ -5,6 +5,8 @@
     <action>
         <name>{action_name}</name>
         <input>{action_input}</input>
+        <evidence> Provide the minimal observable evidence you expect after this action (e.g., "Dialog 'Save as' open", "Button 'OK' visible").</evidence>
+        <post_check>Provide a one-line verification the agent must perform after the action to confirm success.</post_check>
     </action>
 </output>
 ```
\ No newline at end of file
diff --git a/windows_use/agent/registry/service.py b/windows_use/agent/registry/service.py
index 4733109..7f5f9ee 100644
--- a/windows_use/agent/registry/service.py
+++ b/windows_use/agent/registry/service.py
@@ -1,6 +1,7 @@
 from windows_use.agent.registry.views import ToolResult
 from windows_use.agent.desktop.service import Desktop
 from windows_use.tool import Tool
+from windows_use.tool.service import ToolResult as RawToolResult
 from textwrap import dedent
 import json
 
@@ -31,8 +32,38 @@ def execute(self, tool_name: str, desktop: Desktop|None=None, **kwargs) -> ToolR
         if tool is None:
             return ToolResult(is_success=False, error=f"Tool '{tool_name}' not found.")
         try:
+            # Preprocess common alternative selectors (e.g., label -> loc)
+            if desktop and 'label' in kwargs and 'loc' not in kwargs:
+                try:
+                    label = int(kwargs.pop('label'))
+                    coords = desktop.get_coordinates_from_label(label)
+                    kwargs['loc'] = coords
+                except (IndexError, ValueError) as e:
+                    return ToolResult(is_success=False, error=f"Invalid label selector: {e}")
+
             args=tool.model.model_validate(kwargs)
-            content = tool.invoke(**({'desktop': desktop} | args.model_dump()))
-            return ToolResult(is_success=True, content=content)
+            raw = tool.invoke(**({'desktop': desktop} | args.model_dump()))
+            # If tool returned a Raw ToolResult (from windows_use.tool.service), map it
+            if isinstance(raw, RawToolResult):
+                is_ok = raw.status.lower() in ("ok", "success")
+                content_str = None
+                if raw.evidence:
+                    # Prefer a readable representation of evidence
+                    try:
+                        import json
+                        content_str = json.dumps(raw.evidence)
+                    except Exception:
+                        content_str = str(raw.evidence)
+                elif raw.details:
+                    content_str = str(raw.details)
+                else:
+                    content_str = None
+                return ToolResult(is_success=is_ok, content=content_str, error=None if is_ok else str(raw.details), confidence=raw.confidence, evidence=raw.evidence)
+            # If tool returned arbitrary dict or string, normalize
+            if isinstance(raw, dict):
+                return ToolResult(is_success=True, content=str(raw))
+            if isinstance(raw, str):
+                return ToolResult(is_success=True, content=raw)
+            return ToolResult(is_success=True, content=str(raw))
         except Exception as error:
             return ToolResult(is_success=False, error=str(error))
\ No newline at end of file
diff --git a/windows_use/agent/registry/views.py b/windows_use/agent/registry/views.py
index 97488f1..e93850e 100644
--- a/windows_use/agent/registry/views.py
+++ b/windows_use/agent/registry/views.py
@@ -3,4 +3,6 @@
 class ToolResult(BaseModel):
     is_success: bool
     content: str | None = None
-    error: str | None = None
\ No newline at end of file
+    error: str | None = None
+    confidence: float | None = None
+    evidence: dict | None = None
\ No newline at end of file
diff --git a/windows_use/agent/service.py b/windows_use/agent/service.py
index cb36cd2..4526ab0 100644
--- a/windows_use/agent/service.py
+++ b/windows_use/agent/service.py
@@ -86,11 +86,17 @@ def invoke(self,query: str)->AgentResult:
                         for consecutive_failures in range(1, self.max_consecutive_failures + 1):
                             try:
                                 llm_response = self.llm.invoke(messages+error_messages)
+                                # Ensure LLM returned usable content
+                                if not hasattr(llm_response, 'content') or llm_response.content is None:
+                                    raise ValueError("LLM returned empty or invalid content")
                                 agent_data = xml_parser(llm_response)
                                 break
                             except ValueError as e:
                                 error_messages.clear()
-                                error_messages.append(llm_response)
+                                # Append previous LLM content if available for context
+                                if 'llm_response' in locals() and llm_response is not None:
+                                    prev_content = getattr(llm_response, 'content', None) or str(llm_response)
+                                    error_messages.append(HumanMessage(content=f"Previous response: {prev_content}"))
                                 error_messages.append(HumanMessage(content=f"Response rejected, invalid response format\nError: {e}\nAdhere to the format specified in <output_contract>"))
                                 logger.warning(f"[LLM]: Invalid response format, Retrying attempt {consecutive_failures}/{self.max_consecutive_failures}...")
                                 if consecutive_failures == self.max_consecutive_failures:
@@ -147,10 +153,26 @@ def invoke(self,query: str)->AgentResult:
                         else:
                             logger.info(f"[Tool] 🔧 Action: {action_name}({', '.join(f'{k}={v}' for k, v in params.items())})")
                             action_response = self.registry.execute(tool_name=action_name, desktop=self.desktop, **params)
+                            # Basic post-action verification and confidence handling
                             observation = action_response.content if action_response.is_success else action_response.error
                             logger.info(f"[Tool] 📝 Observation: {observation}\n")
                             agent_data.observation = observation
 
+                            # If tool returned a confidence and it's low, treat as non-success and request retry
+                            low_confidence = False
+                            if getattr(action_response, 'confidence', None) is not None:
+                                try:
+                                    conf = float(action_response.confidence)
+                                    if conf < 0.95:
+                                        low_confidence = True
+                                except Exception:
+                                    pass
+
+                            if low_confidence:
+                                logger.warning(f"[Tool] ⚠️ Low confidence ({action_response.confidence}); requesting clarification/retry.")
+                                # Convert to observation that signals failure for the LLM to reconsider
+                                agent_data.observation = f"LOW_CONFIDENCE: {observation}"
+
                             desktop_state = self.desktop.get_state(use_vision=self.use_vision)
                             human_prompt = Prompt.observation_prompt(query=query, agent_step=self.agent_step,
                                 tool_result=action_response, desktop_state=desktop_state
diff --git a/windows_use/llms/anthropic.py b/windows_use/llms/anthropic.py
index 9ba5c4c..204627c 100644
--- a/windows_use/llms/anthropic.py
+++ b/windows_use/llms/anthropic.py
@@ -9,12 +9,13 @@
 
 @dataclass
 class ChatAnthropic(BaseChatLLM):
-    def __init__(self, model: str, api_key: str, thinking_budget:int=-1, temperature: float = 0.7, max_tokens: int = 8192, auth_token: str | None = None, base_url: str | None = None, timeout: float | None = None, max_retries: int = 3, default_headers: dict[str, str] | None = None, default_query: dict[str, object] | None = None, http_client: Client | None = None, strict_response_validation: bool = False):
+    def __init__(self, model: str, api_key: str, thinking_budget:int=-1, temperature: float = 0.0, profile: str | None = None, max_tokens: int = 8192, auth_token: str | None = None, base_url: str | None = None, timeout: float | None = None, max_retries: int = 3, default_headers: dict[str, str] | None = None, default_query: dict[str, object] | None = None, http_client: Client | None = None, strict_response_validation: bool = False):
         self.model = model
         self.api_key = api_key
         self.auth_token = auth_token
         self.max_tokens = max_tokens
         self.temperature = temperature
+        self.profile = profile
         self.base_url = base_url
         self.thinking_budget=thinking_budget
         self.timeout = timeout
diff --git a/windows_use/llms/azure_openai.py b/windows_use/llms/azure_openai.py
index 2120108..dabdd86 100644
--- a/windows_use/llms/azure_openai.py
+++ b/windows_use/llms/azure_openai.py
@@ -18,7 +18,8 @@ def __init__(
         api_key: str,
         model: str | None = None,
         api_version: str = "2024-10-21",
-        temperature: float = 0.7, 
+        temperature: float = 0.0, 
+        profile: str | None = None,
         max_retries: int = 3,
         timeout: float | None = None,
         default_headers: dict[str, str] | None = None,
@@ -31,6 +32,7 @@ def __init__(
         self.model = model
         self.api_version = api_version
         self.temperature = temperature
+        self.profile = profile
         self.max_retries = max_retries
         self.timeout = timeout
         self.default_headers = default_headers
diff --git a/windows_use/llms/cerebras.py b/windows_use/llms/cerebras.py
index 06935ee..8384c10 100644
--- a/windows_use/llms/cerebras.py
+++ b/windows_use/llms/cerebras.py
@@ -10,10 +10,11 @@
 
 @dataclass
 class ChatCerebras(BaseChatLLM):
-    def __init__(self, model: str, api_key: str, temperature: float = 0.7,  base_url: str | None = None, timeout: float | None = None, max_retries: int = 3, default_headers: dict[str, str] | None = None, default_query: dict[str, object] | None = None, http_client: Client | None = None, strict_response_validation: bool = False, warm_tcp_connection: bool = True):
+    def __init__(self, model: str, api_key: str, temperature: float = 0.0, profile: str | None = None, base_url: str | None = None, timeout: float | None = None, max_retries: int = 3, default_headers: dict[str, str] | None = None, default_query: dict[str, object] | None = None, http_client: Client | None = None, strict_response_validation: bool = False, warm_tcp_connection: bool = True):
         self.model = model
         self.api_key = api_key
         self.temperature = temperature
+        self.profile = profile
         self.base_url = base_url
         self.timeout = timeout
         self.max_retries = max_retries
diff --git a/windows_use/llms/google.py b/windows_use/llms/google.py
index 97fd296..3548d46 100644
--- a/windows_use/llms/google.py
+++ b/windows_use/llms/google.py
@@ -30,11 +30,12 @@ def run_async(coro):
 
 @dataclass
 class ChatGoogle(BaseChatLLM):
-    def __init__(self, model: str, thinking_budget: int=-1, api_key: str=None, vertexai: bool|None=None, project: str|None=None, location: str|None=None, credentials: Credentials|None=None,http_options: types.HttpOptions | types.HttpOptionsDict | None = None, debug_config: DebugConfig | None = None, temperature: float = 0.7):
+    def __init__(self, model: str, thinking_budget: int=-1, api_key: str=None, vertexai: bool|None=None, project: str|None=None, location: str|None=None, credentials: Credentials|None=None,http_options: types.HttpOptions | types.HttpOptionsDict | None = None, debug_config: DebugConfig | None = None, temperature: float = 0.0, profile: str | None = None):
         self.model = model
         self.api_key = api_key
         self.vertexai = vertexai
         self.temperature = temperature
+        self.profile = profile
         self.credentials = credentials
         self.project = project
         self.location = location
diff --git a/windows_use/llms/groq.py b/windows_use/llms/groq.py
index c995a1c..635d41b 100644
--- a/windows_use/llms/groq.py
+++ b/windows_use/llms/groq.py
@@ -11,10 +11,11 @@
 
 @dataclass
 class ChatGroq(BaseChatLLM):
-    def __init__(self, model: str, api_key: str, base_url: str|None=None, temperature: float = 0.7,max_retries: int = 3,timeout: int|None=None, default_headers: dict[str, str] | None = None, default_query: dict[str, object] | None = None, http_client: Client | None = None, strict_response_validation: bool = False):
+    def __init__(self, model: str, api_key: str, base_url: str|None=None, temperature: float = 0.0, profile: str | None = None, max_retries: int = 3,timeout: int|None=None, default_headers: dict[str, str] | None = None, default_query: dict[str, object] | None = None, http_client: Client | None = None, strict_response_validation: bool = False):
         self.model = model
         self.api_key = api_key
         self.temperature = temperature
+        self.profile = profile
         self.max_retries = max_retries
         self.base_url = base_url
         self.timeout = timeout
diff --git a/windows_use/llms/mistral.py b/windows_use/llms/mistral.py
index fbe115e..e6adf57 100644
--- a/windows_use/llms/mistral.py
+++ b/windows_use/llms/mistral.py
@@ -9,10 +9,11 @@
 
 @dataclass
 class ChatMistral(BaseChatLLM):
-    def __init__(self, model: str, api_key: str, max_tokens: int|None=None, temperature: float = 0.7, server: Union[str, None] = None, server_url: Union[str, None] = None, url_params: Dict[str, str] = None, client: Type[HttpClient] = None, async_client: Type[AsyncHttpClient] = None,retry_config: OptionalNullable[RetryConfig] = None,timeout_ms: Union[int, None] = None,debug_logger: Union[logging.Logger, None] = None):
+    def __init__(self, model: str, api_key: str, max_tokens: int|None=None, temperature: float = 0.0, profile: str | None = None, server: Union[str, None] = None, server_url: Union[str, None] = None, url_params: Dict[str, str] = None, client: Type[HttpClient] = None, async_client: Type[AsyncHttpClient] = None,retry_config: OptionalNullable[RetryConfig] = None,timeout_ms: Union[int, None] = None,debug_logger: Union[logging.Logger, None] = None):
         self.model = model
         self.api_key = api_key
         self.temperature = temperature
+        self.profile = profile
         self.server = server
         self.max_tokens = max_tokens
         self.server_url = server_url
diff --git a/windows_use/llms/ollama.py b/windows_use/llms/ollama.py
index 61f0e2a..0b0bee3 100644
--- a/windows_use/llms/ollama.py
+++ b/windows_use/llms/ollama.py
@@ -7,11 +7,12 @@
 
 @dataclass
 class ChatOllama(BaseChatLLM):
-    def __init__(self,host: str|None=None, model: str|None=None, think:bool=False, temperature: float = 0.7,timeout: int|None=None):
+    def __init__(self,host: str|None=None, model: str|None=None, think:bool=False, temperature: float = 0.0, profile: str | None = None, timeout: int|None=None):
         self.host = host
         self.model = model
         self.think=think
         self.temperature = temperature
+        self.profile = profile
         self.timeout = timeout
         self._client = None
     
diff --git a/windows_use/llms/open_router.py b/windows_use/llms/open_router.py
index 59d76b7..6b4e2bc 100644
--- a/windows_use/llms/open_router.py
+++ b/windows_use/llms/open_router.py
@@ -11,10 +11,11 @@
 
 @dataclass
 class ChatOpenRouter(BaseChatLLM):
-    def __init__(self, model: str, api_key: str, base_url: str|None=None, temperature: float = 0.7,max_retries: int = 3,timeout: int|None=None, default_headers: dict[str, str] | None = None, default_query: dict[str, object] | None = None, http_client: Client | None = None, strict_response_validation: bool = False):
+    def __init__(self, model: str, api_key: str, base_url: str|None=None, temperature: float = 0.0, profile: str | None = None, max_retries: int = 3,timeout: int|None=None, default_headers: dict[str, str] | None = None, default_query: dict[str, object] | None = None, http_client: Client | None = None, strict_response_validation: bool = False):
         self.model = model
         self.api_key = api_key
         self.temperature = temperature
+        self.profile = profile
         self.max_retries = max_retries
         self.base_url = base_url
         self.timeout = timeout
diff --git a/windows_use/llms/openai.py b/windows_use/llms/openai.py
index 5b12c4d..5d8dfc3 100644
--- a/windows_use/llms/openai.py
+++ b/windows_use/llms/openai.py
@@ -11,10 +11,11 @@
 
 @dataclass
 class ChatOpenAI(BaseChatLLM):
-    def __init__(self, model: str, api_key: str, organization: str|None=None, project: str|None=None, base_url: str|None=None, websocket_base_url: str|None=None, temperature: float = 0.7,max_retries: int = 3,timeout: int|None=None, default_headers: dict[str, str] | None = None, default_query: dict[str, object] | None = None, http_client: Client | None = None, strict_response_validation: bool = False):
+    def __init__(self, model: str, api_key: str, organization: str|None=None, project: str|None=None, base_url: str|None=None, websocket_base_url: str|None=None, temperature: float = 0.0, profile: str | None = None, max_retries: int = 3,timeout: int|None=None, default_headers: dict[str, str] | None = None, default_query: dict[str, object] | None = None, http_client: Client | None = None, strict_response_validation: bool = False):
         self.model = model
         self.api_key = api_key
         self.temperature = temperature
+        self.profile = profile
         self.max_retries = max_retries
         self.organization = organization
         self.project = project
diff --git a/windows_use/simulator.py b/windows_use/simulator.py
new file mode 100644
index 0000000..7fc784e
--- /dev/null
+++ b/windows_use/simulator.py
@@ -0,0 +1,24 @@
+from dataclasses import dataclass
+
+@dataclass
+class DummyDesktopState:
+    tree: dict
+    screenshot: bytes | None = None
+
+class Simulator:
+    """Simple deterministic simulator harness for unit tests."""
+    def __init__(self):
+        self.state = DummyDesktopState(tree={"apps":[],"interactive":[]}, screenshot=None)
+
+    def step_click(self, target_id: str):
+        # deterministic behavior: if target exists, return success
+        for el in self.state.tree.get("interactive",[]):
+            if el.get("id") == target_id:
+                return {"status":"ok","evidence":{"clicked":target_id},"confidence":1.0}
+        return {"status":"error","details":"element_not_found","confidence":0.0}
+
+    def add_element(self, el: dict):
+        self.state.tree.setdefault("interactive",[]).append(el)
+
+    def get_state(self):
+        return self.state
diff --git a/windows_use/telemetry/views.py b/windows_use/telemetry/views.py
index 5f9c314..31b2dbc 100644
--- a/windows_use/telemetry/views.py
+++ b/windows_use/telemetry/views.py
@@ -25,4 +25,9 @@ class AgentTelemetryEvent(BaseTelemetryEvent):
     error: str | None=None
     event_name: str = "agent_event"
     is_success:bool=False
+    action_intent_confidence: float | None = None
+    action_success: bool | None = None
+    evidence_mismatch: bool | None = None
+    rerun_count: int | None = None
+    post_check_pass: bool | None = None
     
diff --git a/windows_use/tool/service.py b/windows_use/tool/service.py
index fb83a31..5f042a8 100644
--- a/windows_use/tool/service.py
+++ b/windows_use/tool/service.py
@@ -1,5 +1,5 @@
 from pydantic import BaseModel
-from typing import Any
+from typing import Any, Union
 
 class Tool:
     def __init__(self, name: str|None=None, description: str|None=None, args_schema:BaseModel|None=None):
@@ -28,4 +28,21 @@ def __call__(self, function):
         return self
     
     def invoke(self, *args, **kwargs):
-        return self.function(*args, **kwargs)
\ No newline at end of file
+        result = self.function(*args, **kwargs)
+        # Normalize and validate result to ToolResult when possible
+        if isinstance(result, dict):
+            try:
+                return ToolResult.parse_obj(result)
+            except Exception:
+                return ToolResult(status="error", evidence={"raw": result}, confidence=0.0, details="invalid tool result schema")
+        if isinstance(result, ToolResult):
+            return result
+        # Wrap arbitrary return values
+        return ToolResult(status="ok", evidence={"result": result}, confidence=1.0)
+
+
+class ToolResult(BaseModel):
+    status: str
+    evidence: dict | None = None
+    confidence: float = 1.0
+    details: Union[str, dict, None] = None
\ No newline at end of file