pix_list_open_captures

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

Annotations already provide the read-only, idempotent, and non-destructive safety profile. The description adds that only open sessions are returned and that cached artifacts are part of the result, which gives useful behavioral expectations beyond those hints.

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 a single front-loaded sentence with no filler: it states the verb, resource, and output contents. Every word contributes.

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 zero-parameter, read-only listing tool with an output schema and comprehensive annotations, the description is complete. It tells the agent what the list contains without needing to replicate schema details.

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 input schema is empty and there are zero parameters, so the baseline is 4. The description does not introduce any parameter semantics, which is appropriate since there are none to document.

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 identifies the operation ('List'), the resource ('open capture sessions'), and the relevant output fields (ids, paths, cached artifacts). This is specific enough to distinguish it from sibling open/close/get-overview capture tools.

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 'open capture sessions' phrasing gives clear context for when this tool should be used: enumerating current sessions and their cached artifacts. It does not explicitly name alternatives or exclusions, but the intended use is obvious from the scope.

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