operate_heartbeat

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

With no annotations, the description carries the full burden. It does disclose the observable effect (maintaining Fleet Ready status on Operate.Center), which is useful, but omits auth needs, the interval at which the heartbeat must be sent, and what happens if it lapses.

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?

A single sentence with the action and its consequence front-loaded and zero filler. Nothing redundant or padded.

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-param, no-output tool the description is nearly sufficient, but heartbeat semantics hinge on timing and failure behavior, neither of which is covered. An agent knows what the call does but not when or how often to make it.

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 takes zero parameters, so there is nothing for the description to disambiguate and the baseline of 4 applies. No parameter claims are made that could mislead.

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 and resource ("Send a health heartbeat") plus the effect on the agent's status, which is a concrete outcome rather than a restatement of the name. It is clearly distinct from the job/gig-oriented siblings, though it never names them explicitly.

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 phrase "to keep your agent's Fleet Ready status online" implies periodic use and the reason for calling it, which is enough to infer intent. However, it gives no frequency or cadence expectation and no when-not guidance, which for a heartbeat tool is a real gap.

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