save_session

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

With no annotations, the description carries the full burden and does disclose two important traits beyond the schema: it opens a visible, user-facing browser window (requires human interaction/GUI) and it persists authenticated cookies (a durable side effect). It omits what happens on timeout, whether it overwrites an existing session, and any auth/permission requirements.

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 with no filler; the alias relationship is front-loaded and the behavioral detail follows immediately. Nothing could be removed without losing information.

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 two-parameter tool with full schema coverage and no output schema, most needs are met, and the visible-window and cookie-persistence notes are the key behavioral facts. It is still slightly thin on the stateful/interactive consequences (blocking behavior, failure handling) that matter for a login tool.

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%, so both 'platform' (with its enum) and 'wait_seconds' (with its default) are fully documented in the schema. The description adds nothing about parameter meaning, so the baseline 3 applies.

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 states a specific action (open a visible browser window for the user to log in) and names the tool it aliases (login_account), so its function is unambiguous. However, because it self-declares as a duplicate of a sibling, it does not explain what distinguishes it from login_account for selection purposes.

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?

No when-to-use or when-not-to-use guidance is given, and the fact that this is presented as an alias of login_account makes the routing question worse: an agent cannot tell from the text whether to call save_session or login_account. Preconditions (an interactive environment with a visible window) are only implied by the behavior sentence.

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