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Atla MCP サーバー

最先端の LLMJ 評価のために LLM が Atla API と対話するための標準化されたインターフェースを提供する MCP サーバー実装。

Atlaの詳細については、こちらをご覧ください。Model Context Protocolの詳細については、こちらをご覧ください。

利用可能なツール

  • evaluate_llm_response : 指定された評価基準を用いて、LLMのプロンプトへの応答を評価します。この関数は、内部的にAtla評価モデルを使用して、モデルの応答のスコアを含む辞書と、モデルの応答に対するフィードバックを含むテキスト形式の批評を返します。

  • evaluate_llm_response_on_multiple_criteria : プロンプトに対するLLMの応答を複数の評価基準に基づいて評価します。この関数は、内部的にAtla評価モデルを使用して、指定された基準に対する評価スコアと批評を含む辞書のリストを返します。

Related MCP server: Ollama MCP Server

使用法

MCPサーバーを使用するには、Atla APIキーが必要です。既存のAPIキーはこちらで確認するか、こちらから新しいAPIキーを作成してください。

インストール

Python環境の管理にはuv使用をお勧めします。インストール手順についてはこちらをご覧ください。

サーバーを手動で実行する

uvをインストールして Atla API キーを取得したら、 uvx ( uvによって提供される) を使用して MCP サーバーを手動で実行できます。

ATLA_API_KEY=<your-api-key> uvx atla-mcp-server

サーバーに接続しています

別のクライアントへの接続で問題が発生したり、サポートが必要な場合は、お気軽に問題を報告したり、お問い合わせください。

OpenAIエージェントSDK

OpenAI Agents SDK を MCP サーバーで使用する方法の詳細については、公式ドキュメントを参照してください。

  1. OpenAI Agents SDK をインストールします。

pip install openai-agents

  1. OpenAI Agents SDK を使用してサーバーに接続します。

import os

from agents import Agent
from agents.mcp import MCPServerStdio

async with MCPServerStdio(
        params={
            "command": "uvx",
            "args": ["atla-mcp-server"],
            "env": {"ATLA_API_KEY": os.environ.get("ATLA_API_KEY")}
        }
    ) as atla_mcp_server:
    ...

クロードデスクトップ

Claude Desktop で MCP サーバーを構成する方法の詳細については、公式の MCP クイックスタート ガイドを参照してください。

  1. claude_desktop_config.jsonファイルに次の内容を追加します。

{
  "mcpServers": {
    "atla-mcp-server": {
      "command": "uvx",
      "args": ["atla-mcp-server"],
      "env": {
        "ATLA_API_KEY": "<your-atla-api-key>"
      }
    }
  }
}

  1. 変更を適用するには、 Claude Desktop を再起動します。

利用可能な MCP ツールのリストに、 atla-mcp-serverのオプションが表示されるようになります。

カーソル

Cursor で MCP サーバーを構成する方法の詳細については、公式ドキュメントを参照してください。

  1. .cursor/mcp.jsonファイルに次のコードを追加します。

{
  "mcpServers": {
    "atla-mcp-server": {
      "command": "uvx",
      "args": ["atla-mcp-server"],
      "env": {
        "ATLA_API_KEY": "<your-atla-api-key>"
      }
    }
  }
}

利用可能な MCP サーバーのリストにatla-mcp-server表示されるはずです。

貢献

貢献を歓迎します！詳細については、 CONTRIBUTING.mdファイルをご覧ください。

ライセンス

このプロジェクトはMITライセンスの下で提供されています。詳細はLICENSEファイルをご覧ください。

Available Tools

2 tools
evaluate_llm_responseA

Evaluate an LLM's response to a prompt using a given evaluation criteria.

This function uses an Atla evaluation model under the hood to return a dictionary
containing a score for the model's response and a textual critique containing
feedback on the model's response.

Returns:
    dict[str, str]: A dictionary containing the evaluation score and critique, in
        the format `{"score": <score>, "critique": <critique>}`.
ParametersJSON Schema
NameRequiredDescriptionDefault
evaluation_criteriaYesThe specific criteria or instructions on which to evaluate the model output. A good evaluation criteria should provide the model with: (1) a description of the evaluation task, (2) a rubric of possible scores and their corresponding criteria, and (3) a final sentence clarifying expected score format. A good evaluation criteria should also be specific and focus on a single aspect of the model output. To evaluate a model's response on multiple criteria, use the `evaluate_llm_response_on_multiple_criteria` function and create individual criteria for each relevant evaluation task. Typical rubrics score responses either on a Likert scale from 1 to 5 or binary scale with scores of 'Yes' or 'No', depending on the specific evaluation task.
llm_promptYesThe prompt given to an LLM to generate the `llm_response` to be evaluated.
llm_responseYesThe output generated by the model in response to the `llm_prompt`, which needs to be evaluated.
expected_llm_outputNoA reference or ideal answer to compare against the `llm_response`. This is useful in cases where a specific output is expected from the model. Defaults to None.
llm_contextNoAdditional context or information provided to the model during generation. This is useful in cases where the model was provided with additional information that is not part of the `llm_prompt` or `expected_llm_output` (e.g., a RAG retrieval context). Defaults to None.
model_idNoThe Atla model ID to use for evaluation. `atla-selene` is the flagship Atla model, optimized for the highest all-round performance. `atla-selene-mini` is a compact model that is generally faster and cheaper to run. Defaults to `atla-selene`.atla-selene

Output Schema

ParametersJSON Schema
NameRequiredDescription

No output parameters

TDQS

A4.1/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

The description discloses that the tool uses an Atla evaluation model under the hood and returns a dictionary. However, with no annotations provided, the description carries full burden for behavioral traits. It does not mention potential rate limits, cost implications, or authentication requirements. The description is adequate but lacks deeper operational transparency.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is concise with three sentences covering purpose, internal mechanism, and output format. It is front-loaded and well-structured. A minor deduction because the return type is specified in a separate block rather than integrated into the prose.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the complexity of 6 parameters (3 required) and the presence of an output schema (described in the return type), the description provides a complete overview. The parameter-level descriptions are very detailed, covering formatting and examples. The sibling tool is referenced, ensuring completeness around alternatives. Slightly lacking in explaining edge cases or error handling.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the input schema already documents all parameters thoroughly. The description does not add new meaning beyond what the schema provides; it mainly reiterates the return format. Baseline score of 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose: evaluating an LLM response using given criteria. It specifies that it uses an Atla evaluation model internally and returns a dictionary with score and critique. It also distinguishes from the sibling tool by referencing evaluate_llm_response_on_multiple_criteria in the evaluation_criteria parameter description.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The evaluation_criteria parameter description explicitly instructs to use the sibling tool for multiple criteria, providing clear guidance on when to use this tool versus the alternative. Additionally, the parameter descriptions include examples and detailed instructions on crafting evaluation criteria, which serves as usage guidance.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

evaluate_llm_response_on_multiple_criteriaA

Evaluate an LLM's response to a prompt across multiple evaluation criteria.

This function uses an Atla evaluation model under the hood to return a list of
dictionaries, each containing an evaluation score and critique for a given
criteria.

Returns:
    list[dict[str, str]]: A list of dictionaries containing the evaluation score
        and critique, in the format `{"score": <score>, "critique": <critique>}`.
        The order of the dictionaries in the list will match the order of the
        criteria in the `evaluation_criteria_list` argument.
ParametersJSON Schema
NameRequiredDescriptionDefault
evaluation_criteria_listYes
llm_promptYesThe prompt given to an LLM to generate the `llm_response` to be evaluated.
llm_responseYesThe output generated by the model in response to the `llm_prompt`, which needs to be evaluated.
expected_llm_outputNoA reference or ideal answer to compare against the `llm_response`. This is useful in cases where a specific output is expected from the model. Defaults to None.
llm_contextNoAdditional context or information provided to the model during generation. This is useful in cases where the model was provided with additional information that is not part of the `llm_prompt` or `expected_llm_output` (e.g., a RAG retrieval context). Defaults to None.
model_idNoThe Atla model ID to use for evaluation. `atla-selene` is the flagship Atla model, optimized for the highest all-round performance. `atla-selene-mini` is a compact model that is generally faster and cheaper to run. Defaults to `atla-selene`.atla-selene

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A3.6/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description adds some behavioral context (uses Atla model under the hood, returns list of dicts) but does not disclose side effects, cost, failure modes, or restrictions. It adds value beyond annotations but falls short of full transparency.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is concise (two sentences plus a return format note) and front-loaded with purpose. Every sentence adds value; no obvious fluff. Minor improvement possible by incorporating usage guidance.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's complexity (6 parameters, output schema exists), the description provides basic purpose and return format but lacks usage guidelines, behavioral warnings, and parameter elaboration. It is incomplete for fully understanding when and how to use the tool effectively.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is high (83%), and the description does not add new meaning to individual parameters beyond the schema. It explains the return format, which aids understanding of the output but does not directly enhance parameter semantics.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states that the tool evaluates an LLM response across multiple criteria using an Atla model and returns a list of dictionaries with score and critique. It distinguishes from the sibling tool 'evaluate_llm_response' by emphasizing 'multiple evaluation criteria', making the purpose and differentiation explicit.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage for multiple criteria but does not explicitly state when to use this tool versus the single-criterion sibling. No when-not-to-use or alternative suggestions are provided, leaving guidance implicit.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. 2 tool updatesv1.0.0
    • Addedevaluate_llm_response
    • Addedevaluate_llm_response_on_multiple_criteria
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TDQS

A3.9/5.0
Disambiguation5/5

The two tools have clearly distinct purposes: one evaluates a single criterion, the other evaluates multiple criteria. Their names and descriptions make the difference unambiguous.

Naming Consistency5/5

Both tool names follow a consistent verb_noun_qualifier pattern, starting with 'evaluate_llm_response' and differentiating with '_on_multiple_criteria'. No mixing of conventions.

Tool Count3/5

With only 2 tools, the server feels thin. While the tools cover the core evaluation functionality, a typical well-scoped server has 3-15 tools, making this borderline insufficient.

Completeness3/5

The tools provide basic evaluation for single and multiple criteria, but lack supporting tools such as managing criteria, listing models, or retrieving history. The surface is minimal and may leave agents with limited options.

Maintenance

ActivityInactive
ResponsivenessSyncing

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