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 genuinely useful behavioral context the annotations do not: the result set spans three ownership scopes (own, workspace, shared), which tells the agent what it will and won't see. It stops short of describing ordering, pagination, or empty-result behavior.

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?

A single dense sentence with the scope constraint front-loaded and no filler. Every clause (ownership scopes, URL, sharing mode, manageability) carries distinct 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?

With no parameters, an output schema present, and read-only annotations, the description needs only to say what comes back and whose apps are covered — it does both. Minor gaps remain around ordering and whether results are paginated or truncated, but these are low-stakes for a listing tool.

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 there is nothing for the description to disambiguate; the baseline of 4 for a 0-param schema is offset slightly because the description spends words on result fields instead of parameters. Nothing is misleading, but there is no parameter meaning to add.

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 ("Lists") and resource ("fuast apps") and narrows the result set precisely: the account's own apps, its workspace's apps, and apps shared with it. That scope wording implicitly separates it from single-app siblings like get_app or inspect_app, but no sibling is named 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?

Usage is implied rather than stated — an agent can infer this is the discovery/enumeration entry point before calling get_app or call_app, but the description never says when to prefer it over check_app, inspect_app, or get_app. No exclusions or prerequisites are given.

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