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Divagnz

React Native Expo MCP

by Divagnz

eas_update

Publish over-the-air updates to specific branches with rollout control and platform targeting for React Native Expo apps.

Instructions

Publish over-the-air (OTA) update via EAS Update

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
branchYesBranch name to publish to
messageYesUpdate message/description
rollout_percentageNoGradual rollout percentage 0-100 (default: 100)
runtime_versionNoRuntime version constraint
platformNoTarget platform
Behavior2/5

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

No annotations are provided, and the description does not disclose behavioral traits such as side effects, authentication requirements, or impact on end-users. It only states the basic action without additional context.

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 a single concise sentence that directly states the tool's purpose. While it could benefit from slightly more context, it is appropriately sized and avoids verbosity.

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?

Given the tool has 5 parameters and no output schema, the description is insufficient. It does not explain the publishing process, expected results, or how to use optional parameters 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 100%, so the input schema already describes all parameters. The tool description adds no extra meaning beyond what is in the schema, achieving baseline score.

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 action ('publish') and the resource ('over-the-air (OTA) update via EAS Update'). It distinguishes from siblings like eas_build (building) and eas_submit (submitting).

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?

The description provides no guidance on when to use this tool vs alternatives. It does not mention prerequisites, when not to use it, or how it relates to other tools like eas_update_status.

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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