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stefanoamorelli

ember-cli-mcp

ember_run_command

Execute Ember CLI commands with raw arguments directly from MCP clients, enabling tasks like running tests, generating components, and building apps.

Instructions

Run any ember command with raw arguments

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
commandYesThe ember command to run (e.g., 'test --filter "my test"')
cwdNoWorking directory
Behavior2/5

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

No annotations are provided, so the description should fully disclose behavior. It fails to mention that running arbitrary commands may have side effects, require certain permissions, or produce output. The description is too succinct for a potentially destructive operation.

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 sentence with no filler. Every word is essential and it is front-loaded with the primary action.

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

Completeness2/5

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

Given the absence of an output schema and annotations, the description should explain return behavior, error handling, and safety. It does not address these, leaving the agent underinformed for such a generic command runner.

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 baseline is 3. The description adds the phrase 'raw arguments' but does not significantly enhance understanding beyond the parameter schema, which already provides examples.

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 'Run any ember command with raw arguments' clearly states the verb 'Run' and resource 'ember command'. It distinguishes from sibling tools that are specific ember subcommands by emphasizing 'any' and 'raw arguments'.

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?

The description provides no guidance on when to use this tool versus specific sibling tools like ember_build or ember_test. It does not mention scenarios where it should be avoided or any prerequisites.

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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