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

It discloses that the key is discarded, which is a useful privacy/retention signal, but it does not state whether the tool is read-only, makes network calls, returns a boolean or error, or has any other side effects. With no annotations, most behavior is left 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?

The text is short and front-loaded, with no filler words. However, it is too terse to convey essential invocation details, so the conciseness is not well balanced with completeness.

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?

The tool has a 9-parameter schema and no output schema or annotations, but the description provides no information about valid key format, return value, error behavior, or parameter selection. It is far from enough for an agent to correctly use this tool.

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 has nine optional string parameters with descriptions that appear copy-pasted from unrelated tools (e.g., city for weather, zone for timezone, feed for RSS); none of them obviously represents a Jira issue key. The descriptions do not clarify which parameter should be checked, and several ('HTTPS URL to normalize or cite', 'JSON text to validate') are actively misleading for a Jira-key-shape validator.

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 says 'Check a Jira issue key shape' but does not define what shape is valid or which input parameter carries the key; the schema lists unrelated parameters, so an agent cannot tell how to invoke the intended purpose. It is more specific than a generic verb, but the missing mapping makes the purpose unclear.

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?

No usage guidance is provided: it never says when to prefer this over sibling tools like domain-shape, github-repo-shape, or normalize-url, nor what input to supply or what output to expect.

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