docs: remove meta tools implementation details from README

Remove references to search algorithms (BM25, TF-IDF, hybrid search) from
the Meta Tools section to keep documentation focused on user-facing
functionality rather than internal implementation details.

Changes:
- Removed mention of "hybrid BM25 + TF-IDF search" from Features section
- Removed entire "Hybrid Search Configuration" section with hybrid_alpha examples
- Removed technical explanations about BM25/TF-IDF algorithms
- Kept focus on what users can do (discover and execute tools)

Rationale:
- Aligns with documentation in agents/python/meta-tools.mdx
- Users don't need to know about underlying search algorithms
- Implementation details can change without affecting user-facing API
- Maintains consistency with Node.js SDK documentation standards
- Follows SDK documentation best practices (focus on "what" and "how to use")

Author: ryoppippi

README.md

@@ -15,7 +15,7 @@ StackOne AI provides a unified interface for accessing various SaaS tools throug
   - Provider and action filtering with `fetch_tools()`
   - Multi-account support
 - Dynamic MCP-backed discovery via `fetch_tools()` so you can pull the latest tools at runtime (accounts, providers, or globbed actions)
-- **Meta Tools** (Beta): Dynamic tool discovery and execution based on natural language queries using hybrid BM25 + TF-IDF search
+- **Meta Tools** (Beta): Dynamic tool discovery and execution based on natural language queries
 - Integration with popular AI frameworks:
   - OpenAI Functions
   - LangChain Tools
@@ -340,7 +340,7 @@ result = feedback_tool.call(
 
 ## Meta Tools (Beta)
 
-Meta tools enable dynamic tool discovery and execution without hardcoding tool names. The search functionality uses **hybrid BM25 + TF-IDF search** for improved accuracy (10.8% improvement over BM25 alone).
+Meta tools enable dynamic tool discovery and execution without hardcoding tool names.
 
 ### Basic Usage
 
@@ -358,30 +358,6 @@ execute_tool = meta_tools.get_tool("meta_execute_tool")
 result = execute_tool.call(toolName="hris_list_employees", params={"limit": 10})
 ```
 
-### Hybrid Search Configuration
-
-The hybrid search combines BM25 and TF-IDF algorithms. You can customize the weighting:
-
-```python
-# Default: hybrid_alpha=0.2 (more weight to BM25, proven optimal in testing)
-meta_tools = tools.meta_tools()
-
-# Custom alpha: 0.5 = equal weight to both algorithms
-meta_tools = tools.meta_tools(hybrid_alpha=0.5)
-
-# More BM25: higher alpha (0.8 = 80% BM25, 20% TF-IDF)
-meta_tools = tools.meta_tools(hybrid_alpha=0.8)
-
-# More TF-IDF: lower alpha (0.2 = 20% BM25, 80% TF-IDF)
-meta_tools = tools.meta_tools(hybrid_alpha=0.2)
-```
-
-**How it works:**
-- **BM25**: Excellent at keyword matching and term frequency
-- **TF-IDF**: Better at understanding semantic relationships
-- **Hybrid**: Combines strengths of both for superior accuracy
-- **Default alpha=0.2**: Optimized through validation testing for best tool discovery
-
 ## Examples
 
 For more examples, check out the [examples/](examples/) directory: