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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds genuinely useful context that the output is a paste-ready prompt intended for the user's chosen builder rather than executable code, but says nothing about prompt length, builder-specific differences, or error behavior for an invalid issue id.

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?

Two sentences, no filler, with the core purpose front-loaded and the argument-sourcing instruction immediately after. Every clause earns its place.

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?

An output schema exists, so the description need not explain the returned structure, and the tool is a simple read-only prompt generator. The only residual gap is behavior for an unrecognized issue id or omitted builder, which is minor for this complexity level.

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?

Schema description coverage is 0% for two parameters, so the description carries the burden. It meaningfully links the required 'issue' argument back to check_app's output, but the optional 'builder' parameter is only implied by the parenthetical list of builder names rather than explained (e.g., behavior when omitted).

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 (return) and concrete artifact (a paste-ready fix prompt) scoped to a specific issue, and names the target builders (Replit Agent, Lovable, Bolt). It is clearly distinguishable from the sibling check_app, which detects issues rather than producing fix text.

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?

Explicitly sets up the workflow dependency: 'Use the issue id from check_app,' which tells the agent this tool is invoked after issue detection and how to source the argument. It stops short of stating when NOT to use it or what to do if no issue has been identified, so it is clear context without exclusions.

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