E2B MCP Server

create_file

Create files with specific paths and content inside an isolated sandbox to support code execution and project setup.

Instructions

Create a file in the sandbox environment

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": {
      "path": "<path>",
      "content": "<content>"
    },
    "name": "create_file"
  }
}

Input Schema

Name	Required	Description
`path`	Yes	File path to create
`content`	Yes	File content
`sandbox_id`	No	Optional sandbox ID to use specific sandbox

Schema Changelog

Changes observed during successful MCP inspections.

First observedv0.1.0Aug 30, 2026

TDQS

B3.2/5.0

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. It states the action ('create a file') but does not mention whether the file is overwritten if it already exists, whether parent directories are created automatically, or any permission or sandbox constraints. This is minimal behavioral transparency for a mutation tool.

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 concise sentence with no filler. It is appropriately sized for a simple tool and immediately communicates the core function.

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?

For a file-creating tool with no annotations and no output schema, the description omits important behavioral details such as overwrite behavior, path handling relative to the sandbox root, and whether content is written exactly as provided. The low complexity keeps this from being a 1, but the description is not complete enough for an agent to predict side effects.

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?

The input schema has 100% coverage with descriptions for all three parameters, so the schema already documents the parameters. The description adds no parameter-specific information, but the baseline of 3 applies because the schema covers the needed semantics.

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 a specific verb ('Create') and resource ('file in the sandbox environment'), which distinguishes it from sibling tools like read_file and list_files. It lacks detail about the file path semantics, but the core purpose is unambiguous.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The purpose implicitly communicates when to use the tool: whenever a file needs to be created in the sandbox. However, there is no explicit guidance about when not to use it or how it compares to related operations like writing files via execute_python or creating files through package installation. The usage context is implied rather than stated.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Deploy Server