hac_sso_login

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

No annotations are provided, so the description carries the full burden. It usefully discloses the interactive nature ('headed browser window for the user to complete'), signaling this is not a silent/automated call. However, it omits whether the call blocks until login finishes, timeout behavior, and where credentials are cached for subsequent tools.

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 sentence, front-loaded with the key behavioral detail (headed interactive browser), no filler. Every word earns its place.

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 need not be described. For a one-optional-param auth launcher this is nearly sufficient, but the un-explained 'host' parameter and absence of any prerequisite/ordering context leave meaningful gaps for an agent wiring it into a workflow.

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 single 'host' parameter has 0% schema description coverage and the description never explains what it scopes or what the default null means. With low coverage the description should compensate, and it does not.

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: 'Launches a headed browser window for the user to complete SAP internal SSO authentication.' This is unambiguous and clearly distinct from every sibling hac_* tool, none of which handle authentication.

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?

Usage is implied — an agent infers this is the tool to run when SSO authentication is needed — but there is no explicit when-to-use, no prerequisites (e.g., that other hac_* tools require this first), and no alternatives mentioned. Adequate but with clear gaps.

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