service_control

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

No annotations are provided, so the description carries the full burden of disclosing behavioral traits. While the verbs such as 'start' and 'stop' imply mutation, the description never mentions potential side effects, permission requirements, or that it may require administrative privileges. This is a meaningful gap for a tool that changes system state.

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 sentence that enumerates all possible actions and the target resource. There is no redundant language or verbose phrasing, making it appropriately sized for a tool with a narrow scope.

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 tool with only three fully described parameters and an output schema present, the description adequately communicates what the tool does. It lacks explicit usage guidance, but given the simplicity of the action set, it is otherwise complete enough for an agent to call 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 input schema provides a name and a description for all three parameters (host, unit, and action), yielding 100% schema coverage. The description adds little beyond restating the allowed action values, so it does not materially enhance understanding of parameter usage.

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 clearly lists specific verbs (start, stop, restart, reload, enable, disable) and the resource (systemd unit), making the primary action obvious. However, it does not explicitly contrast itself with the sibling tool service_status, so it falls short of fully distinguishing between similar operations.

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 offers no guidance on when this tool should be used relative to alternatives like service_status (which presumably reads state) or run_command. It does not state any contextual conditions, exclusions, or recommended alternatives, leaving the agent to infer when to choose this over other tools.

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