get_renders

SERVERWhy Did You Render SOURCE0x1f320/why-did-you-render-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/0x1f320-why-did-you-render-mcp/get-renders.md

WHAT IT DOES

What get_renders does on Why Did You Render

AI agents call get_renders to retrieve information from Why Did You Render without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why get_renders is rated Low

The tool retrieves and queries performance diagnostic data (re-render traces and stack frames) from a React development environment. It has no side effects, does not modify state, execute code, or trigger external operations. The data returned is read-only diagnostic information useful for performance analysis.

From the tool's definition Tool description states it 'Returns all re-renders collected from the browser' and uses 'get_' naming convention, indicating data retrieval. No modification, deletion, or execution capabilities are described.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_renders safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Why Did You Render, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For get_renders, this is the rule to start with:

get_renders Allowed

get_renders is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_renders": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Why Did You Render, apply this rule, and every get_renders call is checked against it from then on.

FAQ

Questions about get_renders

What does the get_renders tool do? +

Returns all re-renders collected from the browser, including stack traces that show the hook chain and component tree that triggered each render. Use the stackFrames field to locate the exact source file and line. If multiple projects are active and no project is specified, the tool will ask you to disambiguate by asking the user for their dev server URL. It is categorised as a Read tool in the Why Did You Render MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_renders? +

Register the Why Did You Render MCP server in PolicyLayer and add a rule for get_renders: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Why Did You Render. Nothing to install.

What risk level is get_renders? +

get_renders is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_renders? +

Yes. Add a rate_limit block to the get_renders rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block get_renders completely? +

Set action: deny in the PolicyLayer policy for get_renders. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides get_renders? +

get_renders is provided by the Why Did You Render MCP server (0x1f320/why-did-you-render-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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