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

The description notes that the key is discarded, which is a useful side-effect disclosure, but no annotations are provided and the description does not clarify return values, error behavior, or whether validation happens locally. It also creates confusion because the schema has unrelated parameters, making the actual behavior of the tool unclear.

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 description is very short and front-loaded with the core purpose, which is a positive trait. However, the terse two-sentence format underdelivers for a tool with seven diverse parameters and no annotations, so the structure is not helpful enough for autonomous selection.

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?

There are no annotations and no output schema, and the description is only two sentences that reference a non-existent key parameter. With seven unrelated schema properties, an agent cannot tell which field to fill, what the tool returns, or what side effects occur beyond the vague 'discarded' note, making the definition operationally incomplete.

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 schema provides descriptions for all seven parameters, so the schema coverage is high, but the tool description does not explain how any parameter maps to a 'Jira issue key'. The central input concept from the tool name and description is completely absent from the input schema, meaning the description adds no useful semantic link for parameter selection.

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 clearly states the tool checks a Jira issue key shape, which is a specific verb and resource and distinguishes it from sibling shape tools like github-repo-shape and figma-url-shape. However, the input schema contains no property called 'key', so the operational target of the tool is unclear despite the stated purpose.

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 gives no guidance on when to use this tool versus alternatives, and no exclusions or prerequisites are mentioned. An agent must infer that it is for validating a Jira issue key format, but the description does not explicitly say that or warn against using other shape-checking tools.

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