indices_list_timezone

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 of behavioral disclosure. It only says 'Get unique timezone values' without indicating the return format (e.g., a list of strings), output structure, or any limitations. For a tool that is effectively a read-only lookup, the description adds minimal behavioral context beyond the name.

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, short sentence with zero unnecessary words. It is front-loaded with the action and resource. There is no fluff, and it is appropriately sized for a parameterless lookup tool.

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?

Given the simplicity of the tool, the description is sparse. It lacks details about return type (e.g., a list of timezone strings), any formatting, or a note that these values can be used to filter indices. Since there is no output schema, the description should explain what the agent will receive, but it does not. This is a significant gap for a complete definition.

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, and schema coverage is 100% (no params to document). Per the instructions, the baseline for 0 parameters is 4. The description correctly adds nothing about parameters since none exist, and no additional semantics are required.

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 ('Get') and a specific resource ('unique timezone values for indices'). It is clear what the tool does and distinguishes it from sibling tools like 'indices_list_exchange' by focusing on timezone. However, it does not explicitly contrast with siblings, so it lacks the explicit differentiation seen in top-tier examples.

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 guidance is provided on when to use this tool versus alternatives. It does not mention that this is useful for obtaining a list of valid timezone filters for indices, nor does it call out any exclusions or alternative tools. The usage context is entirely implicit.

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