planRenameSymbol · TypeScript Rename Helper MCP

WHAT IT DOES

What planRenameSymbol does on TypeScript Rename Helper

AI agents use planRenameSymbol to create or update resources in TypeScript Rename Helper — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your TypeScript Rename Helper environment.

WHY IT NEEDS A POLICY

Why planRenameSymbol needs a policy

This tool generates structured modification instructions (rename edits) that alter code semantics and structure. While it does not directly write to disk—execution is deferred—it produces actionable edit plans that would reversibly modify source code when applied.

From the tool's definition Tool computes and returns 'edit plans' for renaming TypeScript symbols; it explicitly states it returns plans 'without modifying the filesystem,' indicating the edits are proposed but not executed.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

planRenameSymbol Rate-limited

planRenameSymbol stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "planRenameSymbol": {
      "limits": [
        {
          "counter": "planrenamesymbol_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches TypeScript Rename Helper, so you can run agents against it safely.

FAQ

Questions about planRenameSymbol

What does the planRenameSymbol tool do? +

Compute edits to rename a TypeScript symbol at a specific position. Returns edit plans without modifying the filesystem. It is categorised as a Write tool in the TypeScript Rename Helper MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on planRenameSymbol? +

Register the TypeScript Rename Helper MCP server in PolicyLayer and add a rule for planRenameSymbol: 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 TypeScript Rename Helper. Nothing to install.

What risk level is planRenameSymbol? +

planRenameSymbol is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit planRenameSymbol? +

Yes. Add a rate_limit block to the planRenameSymbol 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 planRenameSymbol completely? +

Set action: deny in the PolicyLayer policy for planRenameSymbol. 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 planRenameSymbol? +

planRenameSymbol is provided by the TypeScript Rename Helper MCP server (t09tanaka/ts-rename-helper-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.