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

No annotations are provided, so the description must carry the behavioral burden. It only states 'Key discarded,' which is a minor disclosure about data handling, but it does not explain what constitutes a valid key, whether it returns a boolean, throws errors, or performs any side effects. The behavioral profile is essentially absent.

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 extremely concise: two short sentences with no waste. The purpose is front-loaded. However, it is so brief that it sacrifices essential context, so it is concise but not necessarily well-structured for a complex tool.

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 tool with 9 optional parameters, no output schema, and no annotations, the description is grossly incomplete. It does not explain the expected input format, the validation rules, the return value, or any error behavior. An agent cannot reliably call this tool based on the description alone.

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 100%, so the baseline is 3. However, the description adds no parameter-specific meaning and fails to identify which parameter is the Jira key. The schema descriptions themselves are generic and unrelated to Jira keys, so the agent cannot determine which input to use. The description does not compensate for this gap.

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+resource and distinguishes it from sibling shape-checkers like github-repo-shape or domain-shape. However, the connection to the 9 generic parameters is unclear, which slightly muddies the 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?

There is no guidance on when to use this tool versus alternatives. It does not mention when a Jira key check is appropriate, nor does it reference any sibling tool or exclusion criteria. An agent has no idea if this is the right tool for a given task.

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