router_time_status

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, which fully communicate the safe read-only nature. The description agrees with these annotations and adds specificity about the data returned, but it does not provide additional behavioral details such as output format or response characteristics beyond that.

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 primary resource, then efficiently enumerates the specific data categories. Every phrase contributes meaning and there is no redundant or filler content.

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 simple read-only tool with no parameters, no output schema, and clear annotations, the description is complete. It enumerates all the information categories returned—local time, uptime, timezone configuration, and time service status—which is sufficient for an agent to select and invoke the tool correctly.

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 the schema is empty with 100% coverage, so there is nothing for the description to add about parameter semantics. The baseline for a zero-parameter tool is 4, and the description appropriately focuses on the output rather than inputs.

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 uses a specific verb ('Get') and identifies a clear resource: router local time, uptime, timezone-related configuration, and time service status. This cleanly separates it from the sibling tools, none of which focus on time information.

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 states exactly what information the tool returns, so an agent can infer when to choose it: whenever router time, uptime, timezone settings, or time service status is needed. It does not name alternatives, but no sibling tool appears to cover this same domain, so explicit exclusions are less critical.

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