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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so safety is covered. The description adds real value beyond that by disclosing the shape of the returned schema (selector semantics, prefix rules, display metadata), letting the agent anticipate what it will get before calling.

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, front-loaded with the primary noun phrase, and the sequencing instruction comes last where it belongs. The parenthetical elaborating the selector is dense but every clause carries meaning.

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 return values needn't be spelled out, yet the description still characterizes the key payload component (the membership selector). For a zero-param read-only schema fetch, nothing an agent needs is missing.

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 are no semantics to explain and the baseline of 4 applies. The description correctly spends no words on inputs and instead details the output contract.

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 (get the JSON Schema an app definition must satisfy) and then enumerates the schema's contents: membership SELECTOR with prefix rules, slug folder, member kinds, explicit includes/excludes, and display metadata. This clearly separates it from data-returning siblings like get_app, get_app_version, and get_app_members.

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?

"Fetch this before authoring the definition for create_app / create_app_version" gives explicit ordering and names the exact consumer tools, which is exactly the guidance an agent needs. It lacks a negative case (e.g., when not to call it), but with a zero-param read-only tool an exclusion is close to unnecessary.

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