[FEATURE] Tool development for VectorDB Tool

[ylwu-amzn]

Is your feature request related to a problem?

Agent framework (#1161 ) needs tools to extend functionality. This issue propose to add vectorDB tool to it

What solution would you like?
Build a tool in ml-commons to support neural-search query by using KNN index as vector DB.

Agent framework (#1161 ) will provide a general tool framework. We can build search monitor/alerts tools with that framework.

1. Build against the Tool interface on the agent_framework_dev branch: https://github.com/opensearch-project/ml-commons/blob/feature/agent_framework_dev/spi/src/main/java/org/opensearch/ml/common/spi/tools/Tool.java

2. Review example tools in the Agent Framework POC commit: 1b85cff where there are 6 tools under ml-algorithms/src/main/java/org/opensearch/ml/engine/tools/. A good example is the CatIndices tool: https://github.com/opensearch-project/ml-commons/blob/feature/agent_framework_dev/ml-algorithms/src/main/java/org/opensearch/ml/engine/tools/CatIndexTool.java which shows how to use the NodeClient (IndicesAdminClient) to fetch Cluster Health statistics.

What alternatives have you considered?
N/A

Do you have any additional context?
#1161

[dhrubo-os]

Closing this issue as this is done.