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

There are no annotations, so the description carries the full behavioral burden. It discloses that the key is discarded, which is a useful data-handling trait, but it does not state whether the tool returns a boolean, makes network calls, or has side effects. For a validation tool this leaves important behavior implicit.

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 short sentences with no filler: the purpose is front-loaded and the 'Key discarded' sentence adds a relevant transparency note. It is concise, though the terseness sacrifices essential details.

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 output schema and no annotations, the description should explain the expected return value and the Jira key format, but it does neither. It also fails to reconcile the tool's Jira-only purpose with a nine-parameter schema full of unrelated fields, leaving an agent unable to reliably construct a 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?

Schema description coverage is 100%, so the baseline is 3; each parameter already has a description and many state that values are discarded. The tool-level description adds no mapping between the Jira key and any of the nine parameters, and the schema contains many seemingly unrelated parameters, so it does not help an agent select the correct argument.

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 names a specific verb and resource: 'Check a Jira issue key shape,' which distinguishes it from sibling shape tools like github-repo-shape or figma-url-shape. However, it does not define what a valid shape is (e.g., PROJECT-123) or identify which input parameter carries the key.

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 usage whenever an agent needs to validate a Jira issue key, but it gives no explicit when-to-use/when-not-to-use guidance and does not name alternatives. With a long sibling list of other shape-check tools, this is only minimally sufficient.

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