Add Tool Search advisor for dynamic tool discovery

[arefbehboudi]

Adds dynamic tool discovery to JavaClaw using Spring AI’s Tool Search Tool pattern (Lucene-backed). The agent can now search for relevant tools at runtime instead of receiving the full toolset up front. Feature is gated behind javaclaw.tools.dynamic-discovery.enabled.

Changes

• Add Tool Search Tool + Lucene searcher dependencies
• Register ToolSearcher + ToolSearchToolCallAdvisor behind a feature flag
• Wire the Tool Search advisor into the main agent/ChatClient builder (fallback to legacy eager tool exposure when disabled)
• Add tests for enabled/disabled wiring + Lucene relevance
• Document configuration and tuning in README

How to enable

javaclaw:
  tools:
    dynamic-discovery:
      enabled: true
      max-results: 8
      lucene-min-score-threshold: 0.25

Closes #49

[rdehuyss]

Awesome idea!

Do you think we should make it the default? It would reduce token costs a lot...

[arefbehboudi]

Awesome idea!

Do you think we should make it the default? It would reduce token costs a lot...

@rdehuyss Yes, I agree. It is now enabled by default

[rdehuyss]

Nice work, @arefbehboudi !