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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is covered. The description adds useful behavioral context, namely that the result contains an executable command plus a URL, but says nothing about output shape, whether steps vary by platform support, or failure behavior for unsupported platforms.

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?

The operative sentence is front-loaded and wastes no words. The trailing 'Served by PWAMart (https://pwamart.com)' line is attribution boilerplate that adds no selection or invocation value.

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?

For a two-parameter read-only tool with no output schema, the description is adequate on intent and output handling but incomplete on inputs: an agent must guess what a slug is and how the optional platform affects results. Annotations cover safety, so the remaining gap is parameter-level rather than behavioral.

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 must carry the burden and largely fails. It implies 'a given platform' but never explains the platform enum values, that platform is optional, or what the default is; the required 'slug' parameter is never mentioned at all.

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?

The description states a specific verb+resource: it retrieves how to install an app on a given platform, plus the URL to open. That is materially different from sibling lookups like pwamart_get_app or pwamart_search_apps, though it never names an alternative explicitly.

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?

It gives clear downstream guidance ('an agent with a shell can run the returned command; otherwise show the steps to the user'), which implies the use case of answering an installation question. However, there is no explicit when-to-use versus when-not, and no guidance on obtaining the slug before calling.

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