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🚀 Summary
This PR introduces a flexible Discovery Provider architecture to address the need for dynamic tool discovery mentioned in #4249. Instead of hard-coding a specific API, it provides an abstract BaseDiscoveryProvider that can support multiple backends (like mcp-discovery or Agenium).
🛠️ Changes
Core Architecture: Added BaseDiscoveryProvider and DiscoveryEntry for unified discovery logic.
Implementations: Added MCPDiscoveryProvider targeting the yksanjo API.
New Tool: Added DynamicDiscoveryTool allowing agents to search and optionally auto_register tools at runtime.
Documentation: Comprehensive guide added at docs/en/mcp/tool-discovery.mdx.
🧪 Verification
Created lib/crewai/tests/tools/test_mcp_discovery.py with full Mock coverage.
Verified with an E2E demo script at scripts/demo_mcp_discovery.py.