bambu-printer-mcp

by rowbotik

Overview Schema Source Related Servers Discussions Admin

JavaScript

Local

cancel_print

Cancel the ongoing print job on your Bambu Lab printer to stop printing immediately.

Instructions

Cancel the current print job on the Bambu Lab printer

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "cancel_print"
  }
}

Input Schema

Name	Required	Description
`host`	No	Hostname or IP of the printer (default: value from env)
`bambu_serial`	No	Serial number (default: value from env)
`bambu_token`	No	Access token (default: value from env)

Schema Changelog

Changes observed during successful MCP inspections.

First observedv1.1.1Jun 3, 2026

TDQS

B3.1/5.0

Behavior2/5

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

No annotations are provided, so the description must fully disclose behavior. It states 'cancel' but does not clarify whether the job is removed from the queue, if it can be resumed, or if any confirmation is required. The lack of detail on side effects reduces transparency for an agent.

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 that efficiently communicates the purpose. No unnecessary words or repetitions.

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 cancel action with three optional parameters and no output schema, the description is minimally adequate. However, it lacks mention of prerequisites (e.g., an active job), irreversibility, or what happens to the job data, leaving some gaps for an agent.

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 coverage is 100%, and each parameter has clear descriptions (hostname, serial, token) with defaults from environment. The description adds no extra meaning beyond the schema, meeting the baseline for high coverage.

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 the action 'Cancel' and the resource 'current print job on the Bambu Lab printer'. It distinguishes from sibling tools like pause_print and resume_print by implying finality, though it could explicitly note that it terminates rather than pauses.

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

Usage Guidelines2/5

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

No guidance on when to use this tool versus alternatives like pause_print or start_print_job. Context signals indicate ample siblings, but the description does not specify that this is for stopping a running job irreversibly or that it should be used after confirming no further output is needed.

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