Skip to main content
Glama
Arize-ai

@arizeai/phoenix-mcp

Official
by Arize-ai

list-sessions

List conversation sessions for a project to view grouped traces. Specify limit and sort order to filter results.

Instructions

List sessions for a project.

Sessions represent conversation flows grouped across traces.

Example usage: Show me the last 10 sessions for project "default"

Expected return: Array of session objects ordered by the requested sort order.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
project_identifierNo
limitNo
orderNodesc
Behavior3/5

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

No annotations provided, so description carries the burden. States expected return (array ordered by sort order), but omits details like pagination, field types, or whether sessions include full traces. Basic disclosure, not comprehensive.

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

Conciseness5/5

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

Short, front-loaded with purpose, followed by example and expected return. No redundant sentences.

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 no output schema and no annotations, description provides high-level purpose and output structure but lacks details on parameter formats, error handling, or session object structure. Adequate for simple use but not fully complete.

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

Parameters2/5

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

Schema coverage 0% meaning description must explain parameters. Only implicitly explains limit and order via example and output mention, but project_identifier is not described. No param-level details added.

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?

Clear verb+resource ('List sessions for a project'), includes explanation of sessions as conversation flows, example usage, and distinguishes from sibling get-session (single session).

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?

Example usage implies when to use (list sessions), but no explicit guidance on when not to use or alternatives like get-session or list-traces.

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

Install Server

Other Tools

Latest Blog Posts

MCP directory API

We provide all the information about MCP servers via our MCP API.

curl -X GET 'https://glama.ai/api/mcp/v1/servers/Arize-ai/phoenix'

If you have feedback or need assistance with the MCP directory API, please join our Discord server