utils

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

With no annotations provided, the description carries the behavioral burden and discloses useful traits: no backend call is required, the result is local, and the timezone reflects the MCP host rather than the caller. It does not explicitly state read-only safety, but the operation is inherently a read.

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 short, front-loads the key constraint, and uses a compact action list plus one example. Every sentence adds useful information without unnecessary repetition.

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 one-action utility with no output schema and no annotations, the description covers purpose, usage, and host-timezone semantics well. It stops short of specifying the exact return format or timezone string format, which would fully close the gap.

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 0%, but the sole parameter is a single-value enum and the description explains the meaning of that action, including what it returns. More detail on the returned date/time format could improve it, but the parameter is otherwise fully understandable.

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 identifies the tool as a set of local helpers that avoid a backend call and specifically explains the only available action, current_date_time. It is clear what the tool does, though the broad namespace name 'utils' is only disambiguated by the description.

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?

It gives an explicit usage rule: call this before any tool that takes a future timestamp. The example also shows the intended natural-language trigger, leaving little ambiguity about when to invoke it.

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