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react-render-profile-mcp

react-render-profile-mcp

by vola-trebla
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TypeScript
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trace_state_cascade_footprint

Measure the depth and consumer count of a state update cascade by reconstructing the parent/owner tree traversal for a given commit index in React profiler exports.

Instructions

Reconstructs the virtual parent/owner tree traversal to measure the depth and consumer count of a state update cascade for a specific commit index.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "profile_path": "<profile_path>",
      "commit_index": "<commit_index>"
    },
    "name": "trace_state_cascade_footprint"
  }
}

Input Schema

NameRequiredDescriptionDefault
commit_indexYesZero-based index of the commit to trace
profile_pathYesAbsolute path to the React DevTools Profiler export (.json)

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.2

TDQS

A3.5/5.0
Behavior3/5

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

No annotations are provided, so the description carries the full burden. It does disclose the algorithmic approach (reconstructing the virtual parent/owner tree traversal) and the measurement goals, which gives some insight into behavior. However, it does not state whether the operation is read-only, what inputs are validated, or any performance implications.

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, front-loaded sentence with no redundant words. Every phrase contributes meaning: the verb, the resource, the measurement outputs, and the context (specific commit index). It is efficient and easy to parse.

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?

With no output schema and no annotations, the description must convey the tool's output and behavior. It does mention the outputs (depth and consumer count) but does not explain the return structure or how to interpret them. It also lacks usage context or prerequisites beyond what the schema states. This is adequate but not comprehensive.

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 parameters are already well-documented. The description adds no additional meaning to commit_index or profile_path beyond what the schema provides. It implies the commit index is used to select the specific update, but that is already clear.

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 uses the specific verb 'Reconstructs' and identifies a clear resource: 'the virtual parent/owner tree traversal' to measure 'depth and consumer count of a state update cascade'. This clearly distinguishes it from similar siblings like trace_render_cascade, which focuses on render cascades rather than state updates.

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?

No guidance is provided on when to use this tool versus alternatives. It does not mention any specific scenarios where state cascade tracing is preferable to render cascade tracing or other analysis tools. The description is purely definitional.

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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