// SCAN REPORT

MCP Language Server

6 tools. 2 can modify or destroy data without limits.

2 write tools that can modify data. Rate limits recommended.

Last updated: 10 Jun 2026

2 can modify or destroy data

4 read-only

6 tools total

Community server · catalogue entry verified 10/06/2026

How to control MCP Language Server ↓

TOOL MAP

What MCP Language Server exposes to your agents

Read (4) Write / Execute (2) Destructive / Financial (0)

Running more than one server? Check your whole stack →

MOST DANGEROUS TOOLS

High Risk

The most dangerous MCP Language Server tools

Write · High edit_file This tool creates or modifies data reversibly by editing file contents. Write · Medium rename_symbol Renaming symbols modifies source code across potentially many files in a project.

2 of MCP Language Server's 6 tools can modify, destroy, or commit something on every call — and an agent calls them with no built-in limits.

POLICY

How to control MCP Language Server

PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Language Server, and nothing reaches the server without passing your rules. These are the rules we recommend:

Rate limit write operations

{
  "edit_file": {
    "limits": [
      {
        "counter": "edit_file_per_hour",
        "window": "hour",
        "max": 30,
        "scope": "grant"
      }
    ]
  }
}

Prevents bulk unintended modifications from agents caught in loops.

Cap read operations

{
  "definition": {
    "limits": [
      {
        "counter": "definition_per_minute",
        "window": "minute",
        "max": 60,
        "scope": "grant"
      }
    ]
  }
}

Controls API costs and prevents retry loops from exhausting upstream rate limits.

Create a free account and register MCP Language Server — nothing to install.
Add these rules — paste them, or build them visually. Tune the limits to your setup.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

ENFORCE POLICY ON MCP LANGUAGE →

Free to start. No card required.

FULL CATALOGUE

All 6 MCP Language Server tools

WRITE 2 tools

Write edit_file Allows making multiple text edits to a file based on line numbers. Provides a more reliable and context-econom Write rename_symbol Rename a symbol across a project.

READ 4 tools

Read definition Retrieves the complete source code definition of any symbol (function, type, constant, etc.) from your codebas Read diagnostics Provides diagnostic information for a specific file, including warnings and errors. Read hover Display documentation, type hints, or other hover information for a given location. Read references Locates all usages and references of a symbol throughout the codebase.

FAQ

Questions about MCP Language Server

How do I prevent bulk modifications through MCP Language Server? +

The MCP Language Server server has 2 write tools including edit_file, rename_symbol. Set a rate limit in your policy -- for example, 10 calls per hour prevents an agent from making more than 10 modifications per hour. PolicyLayer enforces this at the gateway, before calls reach MCP Language Server.

How many tools does the MCP Language Server MCP server expose? +

6 tools across 2 categories: Read, Write. 4 are read-only. 2 can modify, create, or delete data.

How do I enforce a policy on MCP Language Server? +

Register the MCP Language Server MCP server in PolicyLayer, apply the suggested rules above (adjust the limits to your use case), and point your AI client at the PolicyLayer proxy URL instead of the server directly. Your agents keep the same tools; PolicyLayer evaluates every call against policy before it executes. Nothing to install, live in minutes.

Enforce policy on every MCP Language Server tool call.

Deterministic rules across all 6 MCP Language Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

ENFORCE POLICY ON MCP LANGUAGE →

Free to start. No card required.

6 MCP Language Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.