Get Current Timestamp

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

With no annotations provided, the description carries the full behavioral burden, yet it does not state the timezone, precision, or format of the returned timestamp. The operation is inherently a safe, side-effect-free read with zero parameters, so the risk of an uninformed call is low, but a material detail is left undisclosed.

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, appropriately sized and front-loaded for a trivial tool with no inputs. It is efficient, though it earns its place only barely given that it duplicates the name.

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?

An output schema exists, so the return value need not be explained in the description, and with zero parameters and no annotations there is little else an agent must know. The only omission is any hint about timezone or format expectations.

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 takes zero parameters, so there is no parameter semantics for the description to explain. Baseline 4 applies per the zero-parameter rule.

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 "Retrieves the current timestamp" is a direct restatement of the tool name and title, adding no distinguishing information. It is not misleading and the resource is unambiguous, but it is essentially a tautology rather than a stated purpose.

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 offered on when to call this tool or in what situations it is preferred. For a trivial utility the usage is arguably self-evident, but the description supplies none of it explicitly.

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