opensearch-project/opensearch-mcp-server-py

[BUG] Tools take a long time to respond

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#185 opened on Mar 2, 2026

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Description

What is the bug?

In the OpenSearch MCP server we make unnecessary calls to OpenSearch cluster for version validation and other auxiliary tasks. This increases the latency of the tools.

How can one reproduce the bug?

Make a cat indices API call and the use OpenSearch MCP server list indices tool. The latency from MCP tool is ~2x

What is the expected behavior?

The latency from the tools should be very close to raw API call

Solution

Do not make multiple HTTP calls when unnecessary

Contributor guide

Research direction
Investigate the unnecessary HTTP calls in the MCP server, specifically version validation and auxiliary tasks, and refactor to avoid multiple calls per tool invocation.
Tech stack
python
Domain
backendapi
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
PythonGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75