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OrcaSlicer-mcp

OrcaSlicer-mcp

by BeMuCa

upload_to_printer

Uploads a G-code file to an Elegoo printer so the print job can be started with start_print.

Instructions

Upload a G-code file to the Elegoo printer; start it with start_print.

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": {
      "gcode_path": "<gcode_path>"
    },
    "name": "upload_to_printer"
  }
}

Input Schema

NameRequiredDescriptionDefault
gcode_pathYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

A3.8/5.0
Behavior3/5

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

No annotations are provided, so the description carries the full burden. It usefully discloses that uploading does not trigger printing, but says nothing about overwrite behavior for duplicate filenames, size or format restrictions, required printer authentication/connection state, or what the tool returns on success or failure.

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?

One compact sentence, front-loaded with the action and resource, with the follow-up call appended after a semicolon. No words are wasted and nothing is buried.

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

Completeness3/5

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

For a simple one-parameter upload tool with no annotations or output schema, the core purpose and the hand-off to start_print are covered. However, an agent still lacks the details most likely to cause a failed call: path semantics and duplicate-file overwrite behavior.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

With a single parameter at 0% schema description coverage, the description should explain the path format. It only implies that gcode_path refers to a G-code file, and does not clarify whether the path is local to the client, remote on the printer, absolute vs relative, or which file extensions are accepted.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource (upload a G-code file) with the target device named (Elegoo printer), and explicitly distinguishes the action from the sibling start_print, which only begins printing. An agent can route between upload_to_printer and start_print without opening either schema.

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

Usage Guidelines4/5

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

Gives clear sequencing context: upload the file here, then call start_print to actually begin printing, which implicitly tells the agent this tool does not itself start a job. It stops short of stating exclusions, such as what to do if a file with the same name already exists.

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