hcm_test_connection

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

The annotation readOnlyHint=true already signals a safe read operation, and the description adds useful mechanics by revealing that connectivity is probed via a workers?limit=1 call. This is consistent with the annotation and gives a bit beyond it, but it does not disclose what the tool returns, what authentication is needed, or how failures surface. Since the annotation carries the safety burden, 3 is appropriate.

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, short sentence that is easily parseable and front-loads the core action. However, the parenthetical 'same as hcm_health, explicit setup name' is slightly cryptic and packs two ideas into a few words, which costs a bit of clarity. Still, it is appropriately compact with no wasted 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 zero-parameter, read-only connectivity probe, the description covers the essential invocation context: what it does and roughly how. There is no output schema, and the description does not explain the return value (e.g., Boolean, status, or error payload), which an agent would benefit from knowing to interpret success and failure. The simplicity keeps this from being a major gap, so 3 is fair.

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 confirms this with 100% coverage, so there is no parameter meaning for the description to add. Per the baseline for zero-parameter tools, this dimension is trivially satisfied. The mention of workers?limit=1 is a helpful implementation detail rather than a parameter specification.

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 opens with a specific verb and object: 'Probe HCM connectivity', so an agent knows this is a health/connectivity check. It even names the underlying call (workers?limit=1), making the operation concrete. However, the parenthetical 'same as hcm_health, explicit setup name' blurs differentiation with the sibling hcm_health, which slightly weakens clarity.

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 names hcm_health as a sibling but gives no explicit guidance on when to choose this tool over it. 'Same as hcm_health, explicit setup name' implies a setup-related context but does not state it directly. An agent is left to infer the distinguishing condition, so the usage guidance is mostly implicit.

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