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Glama
JorgeAlbareda

PrusaSlicer-MCP

pause_print

Destructive

Pauses a running 3D print on a networked printer only after explicit user confirmation, so you can halt temporarily without cancelling the job.

Instructions

Pause the current print. Needs the user's explicit confirmation.

Input Schema

NameRequiredDescriptionDefault
hostYes
confirmation_codeNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

A3.5/5.0
Behavior4/5

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

Annotations only declare destructiveHint=true; the description adds genuinely new behavioral context by disclosing that explicit user confirmation is required before the pause executes. It still omits what happens to the print job, whether it can be resumed, and what failure looks like if confirmation is missing.

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 with zero filler, and the action is front-loaded ahead of the confirmation constraint. Nothing could be removed without losing meaning.

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 destructive mutation with no output schema, the description covers the core action and the consent requirement but leaves key gaps: the meaning of the required host parameter, the confirmation flow, and the resulting print state. It is minimally viable rather than complete.

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?

Schema coverage is 0%, so the description carries the full burden, yet it only vaguely gestures at the confirmation_code parameter via 'explicit confirmation' and says nothing about the required 'host' parameter or the code's format/provenance. An agent cannot tell what to pass for either field.

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 (Pause) and resource (the current print), which cleanly separates it from siblings like resume_print, cancel_print, and start_print. It does not explicitly name those alternatives, but the verb alone 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 description implies usage by stating a prerequisite (the user's explicit confirmation), which tells the agent this is not a fire-and-forget action. However, it gives no explicit when-to-use vs. resume_print/cancel_print guidance and no conditions under which pausing is appropriate or unavailable.

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