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skylarbarrera

react-devtools-mcp

override_props

Modify React component prop values during debugging to test different states and behaviors in real-time.

Instructions

Override a prop value on a component

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
idYesElement ID
pathYesPath to the prop
valueYesNew value
Behavior2/5

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. 'Override' implies a mutation, but the description does not specify permissions required, whether the change is reversible, side effects, or error handling. This is inadequate for a mutation tool with zero annotation coverage.

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, efficient sentence that directly states the tool's purpose without unnecessary words. It is front-loaded and wastes no space, making it easy to parse quickly.

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 this is a mutation tool with no annotations and no output schema, the description is incomplete. It lacks critical behavioral details (e.g., safety, reversibility) and does not explain what happens after overriding (e.g., success response, errors). The high schema coverage helps with parameters, but overall context is insufficient.

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 schema already documents all parameters (id, path, value). The description adds no additional meaning beyond implying these parameters are used for overriding props, which aligns with the schema but does not provide extra context like format examples or constraints.

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 clearly states the action ('override') and target ('a prop value on a component'), which is specific and actionable. However, it does not distinguish this tool from sibling tools like 'override_context', 'override_hooks', or 'override_state', which all perform similar override operations on different aspects of components.

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 prerequisites (e.g., needing a connected component), exclusions, or compare it to sibling tools like 'override_context' or 'override_state', leaving the agent to infer usage context.

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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