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

The annotations already declare read-only, idempotent, non-destructive, and closed-world behavior. The description adds that the resource is public and that canonical URL and channel availability may be returned, but it does not cover not-found behavior, auth requirements, or rate limits.

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 definition is appropriately sized: one front-loaded sentence states the operation and scope, followed by a documentation reference. There is no redundant wording or restatement of the tool name.

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 simple one-parameter read tool with strong annotations, the description is close to sufficient. It mentions some return content, but it omits how to source the stable ID and what happens when the resource is not found, leaving gaps that matter for correct invocation.

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?

There is one parameter and schema description coverage is 0%, so the description must carry the burden of explaining it. It says 'stable ID' but gives no format, example, or guidance on where to obtain that ID, leaving the parameter meaning largely implicit.

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 gives a specific verb and resource: 'Read one public launch resource by its stable ID.' The phrase 'one ... by stable ID' implicitly distinguishes it from search/list siblings such as search_launch_resources, though 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?

The description implies this is the lookup-by-ID tool rather than the search tool, which is useful context. However, it does not explicitly state when to use it versus search_launch_resources, nor does it mention prerequisites such as already having a stable ID.

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