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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered. The description adds that the guide encodes framework rules and constraints (no npm packages, fixed file layout), which is useful context, but says nothing about size, freshness, or whether the guide is versioned for these particular tools.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Front-loaded with the imperative "Call this first", then the content summary, then a short contextual gloss on what a fuast app is. Roughly 55 words with no filler, though the trailing file-path detail is closer to guide content than to tool-selection information.

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

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

A no-parameter, read-only tool with an output schema, so the description only needs to establish purpose and ordering, both of which it does. The one gap is the relationship to the sibling fuast_docs, which the description neither names nor contrasts.

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

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

The tool takes zero parameters, so the baseline is 4; there is no parameter meaning the description needs to compensate for. The input schema and description are consistent on this point.

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

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

States a specific verb and resource: returns the guide for building, checking, deploying and sharing a fuast app, plus the rules apps must follow. It's clear what comes back, though it never distinguishes itself from the sibling fuast_docs, which an agent may consider an overlapping source.

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

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

"Call this first" is explicit sequencing guidance that tells the agent to read this before invoking build/deploy/check tools. There is no explicit when-not guidance or named alternative, but for a bootstrap guide tool the positive instruction covers the main decision.

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