login_finish

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

No annotations are provided, so the description carries the full behavioral burden. It does disclose the significant side-effect of restarting Chrome headless on the same profile, which is useful. However, it doesn't explain what 'verify' involves, what happens to existing browser state on restart, or whether the restart is conditional on the verification result.

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?

One compact sentence with no filler, and the verification-then-restart sequence is front-loaded logically. It is perhaps slightly too terse for the two distinct actions it packs together, but nothing is wasted.

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?

An output schema exists, so return values needn't be explained, and zero parameters means little schema burden. Still, the description leaves the key operational question unanswered: what counts as a verified sign-in and what happens if it failed. For a tool that restarts a browser process, that ambiguity matters.

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 document. The description correctly implies the tool operates implicitly on the current profile, which is consistent with the empty schema. Baseline 4 applies for a zero-parameter tool.

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 names two vague actions: 'verify the sign-in worked' and 'restart the agent Chrome headless on the same profile.' 'Verify' is undefined and the reader can't tell what verification means or what the tool actually returns, though the restart side-effect is concrete. It is distinguishable from login_begin only by implication of a finishing step, not by explicit statement.

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 indicates a post-login context ('verify the sign-in worked'), which implies it should be called after login_begin, but it never names login_begin or states prerequisites. It gives no conditions under which to avoid calling it (e.g., when the browser is already running, or when sign-in failed).

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