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online_configure_eos_sessions

Configure Epic Online Services session, lobby, presence, connect, and stat mirroring flags to control online features in Unreal Engine.

Instructions

Configure EOS session, lobby, presence, connect, and stat mirroring flags.

KB: see knowledge_base/30_ONLINE_SUBSYSTEM_AND_EOS.md#mcp-online-subsystem-and-eos-tools Example: online_configure_eos_sessions(use_eos_sessions=True, use_eos_lobbies=True, use_eos_presence=True)

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
use_eos_connectNo
use_eos_lobbiesNo
use_eos_presenceNo
use_eos_sessionsNo
mirror_stats_to_eosNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

C2.9/5.0
Behavior2/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions 'Configure' which implies mutation, but does not disclose whether the changes persist, affect project settings, require a restart, or have side effects. The KB link is a reference, not a description of behavior.

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 brief and front-loaded with the action. It includes a useful KB reference and an example call, which aids comprehension without excessive text. Every sentence contributes value.

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

Completeness2/5

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

For a tool with 5 optional parameters and no annotations, the description lacks essential context: when to use it, what happens when flags are set, and what the output looks like. The example helps but does not cover usage boundaries or behavioral effects.

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 0%, so the description must compensate. It lists the flags ('session, lobby, presence, connect, and stat mirroring'), which maps directly to the parameter names, but adds little beyond the schema's titles. It does not explain the meaning or consequences of toggling these booleans.

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

Purpose4/5

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

The description states a specific verb ('Configure') and resource ('EOS session, lobby, presence, connect, and stat mirroring flags'), clearly distinguishing the tool from siblings like online_inspect_config or online_configure_default_subsystem. It enumerates the exact flags without being ambiguous.

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

Usage Guidelines2/5

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

There is no explicit guidance on when to use this tool versus alternatives. A code example is provided, but no conditions, exclusions, or references to sibling tools. The usage context is only implied by the tool's name and parameter list.

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

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