Hostinfo Tool

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

With no annotations, the description carries the burden of disclosing behavior. It states that the tool returns hostname, kernel, and OS details, which is sufficient for a simple no-argument read-only info tool. It does not mention execution context or potential errors, but the domain is low-risk and well-specified.

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 appropriately short and front-loaded with the core purpose. The second line ('Returns: Hostname, kernel, and OS details') largely repeats the first sentence, adding minor redundant weight but no significant harm.

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 no-parameter hostinfo tool with an output schema available, the description is complete: it names the data scope and the returned concepts. An agent has everything necessary to decide whether to invoke it and to understand what it will get back.

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%, so the description has no parameter semantics to explain. The baseline for zero-parameter tools applies, and the description adds no conflicting or missing param information.

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 clear verb-resource pair ('Get host identity info') and specifies the exact fields (hostname, kernel, OS). This cleanly separates it from sibling tools that target units, jobs, timers, or sessions.

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 clearly establishes when to use the tool: whenever host-level identity details are needed. It does not mention alternatives or exclusions, but the context is unambiguous enough that no alternative tool could be confused with it.

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