List accessible Jira sites

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

Annotations already declare readOnlyHint=true, openWorldHint=true, destructiveHint=false, so safety is covered. The description still contributes a real behavioral fact beyond them: 'Re-fetches from Atlassian' tells the agent results are live/uncached and therefore incur a network round-trip to the provider, which is not derivable from annotations. It stops short of stating auth requirements or failure behavior, so not a 5.

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, zero filler, with the scope constraint stated before the caching note. Every clause carries information an agent would otherwise have to guess.

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 parameters, no output schema, and annotations covering the safety profile, the remaining burden is small: say what is listed and where it comes from, which it does. Nothing an agent needs in order to invoke this correctly is missing.

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 tool takes zero parameters, so there is no parameter semantics to explain and the baseline of 4 applies. The description correctly makes no attempt at parameter talk, which is the right call.

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?

A specific verb ('Lists') plus resource ('Jira Cloud sites') scoped to 'this account ... through this integration'. An agent knows exactly what it returns, but the description never contrasts it with the nearby jira_select_site sibling, so the boundary is left to inference.

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 closest thing to guidance is 'through this integration', implying an account must already be connected, plus the re-fetch note implying you get fresh data. There is no explicit when-to-use, no mention of jira_select_site as the follow-up, and no stated precondition that auth must be established first.

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