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

Annotations cover the safety profile (readOnlyHint=false, idempotentHint=false, destructiveHint=false, openWorldHint=true), and the description adds genuinely new context: the tool consumes points on every cycle and is metered on the models used. That cost/metering behavior is not derivable from the annotations. It still omits what happens on failure or if the autopilot is already running.

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 opening sentence is front-loaded and efficient, but the trailing parenthetical "(uses points, metered on the models used like the website)" largely restates the preceding "Uses points on every cycle" in looser wording rather than adding a new fact.

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-parameter tool with full annotation coverage and no output schema, the description covers the precondition and the cost side, which is adequate. It leaves gaps around error behavior (e.g., already-running autopilot) and what a successful restart returns.

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 100% and the single parameter is documented as "Autopilot id", so the schema carries the full burden. The description adds no format, source, or lookup guidance for autopilot_id, making 3 the correct baseline.

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?

States a specific verb (restart) and resource (autopilot), plus the precondition that the autopilot must be stopped. It distinguishes itself from stop_autopilot by implication but never names a sibling, so the differentiation is only partial.

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?

"Restart a stopped autopilot" implies the tool is only valid for a stopped autopilot, which is a useful usage condition. However, it gives no guidance about related siblings such as autopilot_action or run_autopilot_agent, or what to do if the autopilot is already running.

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