list_timezones

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

No annotations are provided, so the description must carry the full burden. 'List all timezones available' clearly communicates a read-only, non-destructive operation. It does not add details about output ordering or format, but the output schema is present and the behavior is predictable for a listing operation.

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, well-structured sentence that front-loads the verb and resource. Every word contributes either to scope ('available on the WLAN Pi') or to downstream usage ('for use with set_timezone').

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 listing tool with an output schema, the description is fully sufficient. It tells the agent what the tool does, the scope of the result, and how it fits into a broader workflow with set_timezone. Nothing essential 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 has zero parameters, so the baseline of 4 applies. The description correctly implies that no inputs are needed; mentioning parameters would add no value.

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 states a specific verb ('List') and a specific resource ('all timezones available on the WLAN Pi'). It also distinguishes itself from the sibling get_timezone and set_timezone by focusing on the full set of options rather than the current value or assignment.

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 phrase 'for use with set_timezone' gives a clear usage context: call this when you need to select a timezone to pass to set_timezone. It does not explicitly mention when not to use it or name alternatives, but the intended use case is evident from the pointer.

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