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MCP Server for FTP Access

MCP Server for FTP Access

by alxspiker
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Remote

Upload File

upload-file
DestructiveIdempotent

Transfer a file to an FTP server by specifying the destination path and content; set encoding to base64 for binary uploads.

Instructions

Upload a file to the FTP server. Pass encoding "base64" to upload binary content.

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": {
      "remotePath": "<remotePath>",
      "content": "<content>"
    },
    "name": "upload-file"
  }
}

Input Schema

NameRequiredDescriptionDefault
contentYesContent to upload to the file
encodingNoEncoding of the provided content (default: utf8)
remotePathYesDestination path on the FTP server

Output Schema

NameRequiredDescriptionDefault
remotePathYes
bytesWrittenYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed3 schema fields changedv1.2.2
    • changedInput schema / $schema
      Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • changedOutput schema / $schema
      Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • removedOutput schema / additionalProperties
      Removed value: -false
  2. Addedv1.2.1
  3. Removedv1.2.0
  4. First observed

TDQS

A3.6/5.0
Behavior3/5

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

Annotations already indicate destructiveHint=true and idempotentHint=true, so the agent knows this can overwrite and is safe to retry. The description adds the encoding option, but doesn't explain what happens if the file already exists (overwrite? error?), or whether it requires specific permissions. Some added value, but gaps remain.

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?

Two short sentences, front-loaded with the core action and a key parameter tip. Every sentence earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the simple parameter set, full schema coverage, and annotations covering safety and idempotency, the description is nearly complete. It could mention overwrite behavior, but that's a minor gap.

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 schema fully documents the parameters, including the encoding enum and defaults. The description only repeats the encoding option for binary content, adding no new syntax or format details. Baseline 3 is appropriate.

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?

States a specific verb (upload) and resource (file to the FTP server), which is clear. It doesn't explicitly differentiate from siblings like append-file or edit-file, but the action is distinct enough that an agent can infer its purpose.

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 description implies usage (use base64 for binary), but does not specify when to use this tool versus append-file or edit-file, nor does it mention prerequisites like authentication or directory existence. No explicit when/when-not guidance.

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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