docs: update README and documentation to match current state (v2.5.1)

- Update n8n version from v1.97.1 to v1.99.1 in README
- Fix 7 broken documentation links to point to existing files
- Standardize Docker image size to ~280MB across all docs (was inconsistent: 150MB/200MB/283MB)
- Add missing npm scripts for test commands (test:essentials, test:enhanced-validation, etc.)
- Update CHANGELOG.md with missing versions 2.4.0 through 2.5.1
- Update README_CLAUDE_SETUP.md to list all 21+ MCP tools (was only showing 6)
- Document 5 additional npm scripts in CLAUDE.md
- Update AI-capable nodes count to 263 (was 35 in old docs)

All documentation now accurately reflects the current codebase state.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

docs/README_CLAUDE_SETUP.md

@@ -1,6 +1,6 @@
 # Claude Desktop Configuration for n8n-MCP
 
-This guide helps you connect n8n-MCP to Claude Desktop, giving Claude comprehensive knowledge about n8n's 525+ workflow automation nodes.
+This guide helps you connect n8n-MCP to Claude Desktop, giving Claude comprehensive knowledge about n8n's 525 workflow automation nodes, including 263 AI-capable tools.
 
 ## 🎯 Prerequisites
 
@@ -50,14 +50,13 @@ No installation needed - runs directly from Docker:
 ```json
 {
   "mcpServers": {
-    "n8n-docker": {
+    "n8n-mcp": {
       "command": "docker",
       "args": [
-        "run", "--rm", "-i",
+        "run", "-i", "--rm",
         "-e", "MCP_MODE=stdio",
         "-e", "LOG_LEVEL=error",
         "-e", "DISABLE_CONSOLE_OUTPUT=true",
-        "-v", "n8n-mcp-data:/app/data",
         "ghcr.io/czlonkowski/n8n-mcp:latest"
       ]
     }
@@ -113,23 +112,47 @@ After restarting Claude Desktop:
 2. Try asking Claude: "What n8n nodes are available for working with Slack?"
 3. Or use a tool directly: "Use the list_nodes tool to show me trigger nodes"
 
-## 🔧 Available Tools
+## 🔧 Available Tools (v2.5.1)
 
-Once connected, you can ask Claude to:
+### Essential Tool - Start Here!
+- **`start_here_workflow_guide`** - Essential guide and best practices (ALWAYS use this first!)
 
-- **List nodes**: "Show me all n8n nodes for working with databases"
-- **Get node details**: "How do I use the HTTP Request node?"
-- **Search documentation**: "Find n8n nodes that support OAuth"
-- **Find AI tools**: "What AI-capable nodes are available?"
-- **View statistics**: "Show me n8n-MCP database statistics"
+### Core Tools
+- **`list_nodes`** - List all n8n nodes with filtering options
+- **`get_node_info`** - Get comprehensive information (now includes aiToolCapabilities)
+- **`get_node_essentials`** - Get only 10-20 essential properties (95% smaller!)
+- **`search_nodes`** - Full-text search across all node documentation
+- **`search_node_properties`** - Find specific properties within nodes
+- **`get_node_documentation`** - Get parsed documentation from n8n-docs
+- **`get_database_statistics`** - View database metrics and coverage
 
-Claude will automatically use the appropriate tools:
-- `list_nodes` - Filter and list nodes
-- `get_node_info` - Get detailed node information
-- `search_nodes` - Full-text search
-- `list_ai_tools` - Find AI-capable nodes
-- `get_node_documentation` - Get official docs
-- `get_database_statistics` - View coverage metrics
+### AI Tools (Enhanced in v2.5.1)
+- **`list_ai_tools`** - List AI-capable nodes (ANY node can be used as AI tool!)
+- **`get_node_as_tool_info`** - Get guidance on using any node as an AI tool
+
+### Task & Template Tools
+- **`get_node_for_task`** - Pre-configured node settings for common tasks
+- **`list_tasks`** - Discover available task templates
+- **`list_node_templates`** - Find workflow templates using specific nodes
+- **`get_template`** - Get complete workflow JSON for import
+- **`search_templates`** - Search templates by keywords
+- **`get_templates_for_task`** - Get curated templates for common tasks
+
+### Validation Tools (Professional Grade)
+- **`validate_node_operation`** - Smart validation with operation awareness
+- **`validate_node_minimal`** - Quick validation for just required fields
+- **`validate_workflow`** - Complete workflow validation (validates AI tool connections)
+- **`validate_workflow_connections`** - Check workflow structure
+- **`validate_workflow_expressions`** - Validate n8n expressions including $fromAI()
+- **`get_property_dependencies`** - Analyze property visibility conditions
+
+### Example Questions to Ask Claude:
+- "Show me all n8n nodes for working with databases"
+- "How do I use the HTTP Request node?"
+- "Get the essentials for Slack node" (uses get_node_essentials)
+- "How can I use Google Sheets as an AI tool?"
+- "Validate my workflow before deployment"
+- "Find templates for webhook automation"
 
 ## 🔍 Troubleshooting