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defold_run

Build and launch a Defold project with the debug bridge enabled for playtesting. Use skip_build to relaunch the last build instantly.

Instructions

Build the target project with the debug bridge enabled and launch it (windowed, detached). Returns when the bridge answers (~30-90s with a build). Pass skip_build=true to relaunch the last build fast. If a bridged game is already running, stop it first with defold_stop.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
projectNoRegistered project to target.
skip_buildNoSkip the build; launch the existing build output (default false)

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

A4.7/5.0
Behavior4/5

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 discloses build time (~30-90s), that it waits for bridge response, and that launch is windowed/detached. It does not cover failure modes or error handling, but the core behavioral traits are well communicated.

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 sentences with no filler. The action is front-loaded, timing is given, and the skip_build tip is integrated naturally. Every word earns its place.

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

Completeness5/5

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

For a tool with 2 params and no output schema, the description covers build/launch behavior, timing, skip_build option, and prerequisite of stopping an existing game. Nothing essential for correct invocation is missing.

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

Parameters4/5

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

Schema coverage is 100%, so baseline is 3. The description adds meaning beyond schema by explaining skip_build=true relaunches last build fast, and project is understood as the registered project. This extra context justifies a 4.

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?

The description clearly states the tool's function: build with debug bridge and launch windowed/detached. It explicitly distinguishes from siblings by referencing defold_stop for stopping an existing game, so an agent can tell this is the launch/run tool.

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

Usage Guidelines5/5

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

Provides explicit usage guidance: mentions skip_build=true for fast relaunch, and instructs to stop a running bridged game first with defold_stop. This gives clear when-to-use and alternatives.

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