System Timezone List

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

No annotations are provided, so the description carries the full behavioral burden, and it discloses almost nothing beyond the listing action. It does not state that the operation is read-only, whether authentication/profile setup is required, or any throughput or scope constraints. The verb 'list' weakly implies a safe read, but that is all the agent gets.

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?

A single short sentence with zero filler, front-loaded with the action and resource. Nothing in the text is redundant or padded. Though brief, every word earns its place and there is no structural waste.

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 an output schema present, the description need not explain return values, and the schema covers all connection parameters. However, given the absence of annotations and any usage guidance, the description leaves gaps: it never notes that host/port/scheme/profile imply remote-target or session behavior, nor that the call is a safe read. Adequate but with clear omissions.

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?

Schema description coverage is 100% and all five parameters (host, lang, port, scheme, profile) are documented in the schema itself. The description adds no parameter meaning beyond what the schema provides, so the baseline 3 applies. It neither compensates for nor enriches the structured parameter documentation.

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 supplies a clear verb+resource ('列出系统支持的时区' = list the system's supported timezones), so an agent immediately knows what the tool returns. It does not explicitly distinguish itself from any sibling, but no other timezone-related sibling exists to be confused with, so the ambiguity risk is low.

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 description only states what the tool does; it offers no when-to-use, when-not-to-use, or alternative-selection guidance. For a read-only listing tool the usage is somewhat self-evident, but nothing in the text actually tells the agent when to prefer this over, say, system_info or system_details.

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