feat: AgentCore tool search plugin for Strands Agents

[senthilkumarmohan]

Description of changes:

This pull request introduces the AgentCore Tool Search Plugin for Strands Agents, enabling dynamic semantic tool discovery from AgentCore Gateway based on conversation intent.

AgentCore Tool Search Plugin:

• Added AgentCoreToolSearchPlugin that hooks into before_invocation to derive user intent from conversation history, search the gateway via x_amz_bedrock_agentcore_search, and dynamically register matching tools into the agent. (src/bedrock_agentcore/gateway/integrations/strands/plugins/agentcore_tool_search/plugin.py)
• Implemented IntentProvider abstract interface for pluggable intent derivation strategies. (src/bedrock_agentcore/gateway/integrations/strands/plugins/agentcore_tool_search/intent_providers/intent_provider.py)
• Implemented DefaultIntentProvider which uses an LLM to classify the last N messages into a concise intent string, with support for explicit model override or automatic reuse of the agent's model. (src/bedrock_agentcore/gateway/integrations/strands/plugins/agentcore_tool_search/intent_providers/default_intent_provider.py)

Documentation and Examples:

• Added a comprehensive README.md with usage examples (default and custom intent provider), architecture diagram, prerequisites, and custom intent provider guide. (src/bedrock_agentcore/gateway/integrations/strands/plugins/agentcore_tool_search/README.md)

Testing and Validation:

• Added unit tests for the plugin and intent providers (31 tests). (tests/bedrock_agentcore/gateway/integrations/strands/test_agentcore_tool_search_plugin.py, tests/bedrock_agentcore/gateway/integrations/strands/test_intent_providers.py)
• Added integration tests with a deployable Lambda handler for live gateway testing. (tests_integ/gateway/integrations/test_agentcore_tool_search_plugin.py, tests_integ/gateway/integrations/lambda_function/lambda_function.py)

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[notgitika]

thanks for contributing! added some comments

[codecov-commenter]

Codecov Report

❌ Patch coverage is 92.43697% with 9 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@7d6d4f4). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
...ns/strands/plugins/agentcore_tool_search/plugin.py	89.70%	4 Missing and 3 partials ⚠️
...re_tool_search/intent_providers/intent_provider.py	80.00%	1 Missing ⚠️
...search/intent_providers/strands_intent_provider.py	97.36%	0 Missing and 1 partial ⚠️

Additional details and impacted files

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  Coverage        ?   89.65%           
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  Files           ?       90           
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  Hits            ?     7152           
  Misses          ?      524           
  Partials        ?      301           

Flag	Coverage Δ
unittests	89.65% <92.43%> (?)

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[notgitika]

LGTM thank you!

[jariy17]

run integ test locally