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skylarbarrera

react-devtools-mcp

get_errors_and_warnings

Retrieve all errors and warnings from React components to debug issues and analyze application state during development.

Instructions

Get all errors and warnings from components

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

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 states the action ('Get all errors and warnings') but does not describe how the data is retrieved (e.g., real-time polling, cached results), the format of the output, potential side effects, or any limitations like rate limits or authentication needs. This leaves significant gaps in understanding the tool's behavior.

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?

The description is a single, clear sentence: 'Get all errors and warnings from components.' It is front-loaded with the core action and resource, with no unnecessary words or redundant information, making it highly efficient and easy to parse.

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's complexity (a read operation with no parameters) and the lack of annotations and output schema, the description is incomplete. It does not explain what the output looks like (e.g., list format, error types), how errors and warnings are defined, or any contextual details needed for effective use, leaving the agent with insufficient information for proper invocation.

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

Parameters4/5

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

The input schema has 0 parameters with 100% description coverage, meaning no parameters are documented in the schema. The description does not mention any parameters, which is appropriate since none exist. This aligns with the baseline expectation for zero-parameter tools, as there is nothing to compensate for, but it does not add extra semantic context beyond the schema.

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

Purpose3/5

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

The description 'Get all errors and warnings from components' clearly states the verb ('Get') and resource ('errors and warnings from components'), making the purpose understandable. However, it lacks specificity about what 'components' refers to (e.g., UI components, system components) and does not distinguish itself from sibling tools like 'toggle_error' or 'clear_errors_and_warnings', which are related but serve different functions.

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 versus alternatives. It does not mention scenarios for usage, prerequisites, or exclusions, and fails to reference sibling tools such as 'clear_errors_and_warnings' for clearing errors or 'toggle_error' for toggling error states, leaving the agent without context for tool selection.

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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