release_profile

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

With no annotations, the description carries the full burden, and it does disclose real side effects: the reservation ends and the browser is stopped, plus a record of the session is written. It says nothing about reversibility, what happens if no lease is held, whether the profile data survives, or permission requirements, which are the questions that matter for a terminal teardown call.

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?

Two short sentences, zero filler, with the primary effect front-loaded and the side-effect (recording) trailing. Nothing is padded and nothing needs reordering.

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 parameterless lifecycle terminator with no annotations and no output schema, the description covers the core contract but omits the state requirements an agent needs: whether a lease must be active, what error surfaces if there is nothing to release, and how this differs from the other stop/lease siblings. Adequate but with a clear gap.

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 no parameter semantics to explain; the baseline for a parameterless tool applies. The description correctly implies the tool is targetless, operating on the caller's current reservation.

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 effect: 'End the reservation and stop the browser.' That is more than a restatement of the name and tells the agent this is the teardown step of a profile lifecycle. It does not, however, distinguish itself from nearby siblings such as profile.stop, profile.update or lease_renew, so an agent still has to guess which teardown tool applies.

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?

There is no when-to-use guidance, no prerequisite stated (e.g. that a lease must be held), and no mention of alternatives like lease_renew for extending work or profile.stop for a different kind of shutdown. The agent gets the what but not the when.

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