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

Annotations already declare readOnly, idempotent, non-destructive and closed-world; the description adds genuinely new behavioral facts: it is free, consumes no browser session, and returns both generic method and app-specific detail depending on catalog membership. It does not describe result size or formatting, but the key cost/side-effect question an agent would have is answered.

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?

The content is dense and mostly earns its place, and the call-timing instruction comes early. However the first sentence is a comma-spliced run-on enumerating return contents, and the trailing Glofox action list is long enough to dilute the main instruction.

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?

With no output schema, the description carries the burden of explaining what comes back, and it does: browser recommendation, sign-in link, method, screens, menus, actions, notes, and app-specific tools. For a two-parameter, optional-argument tool this is close to complete; only return shape/size detail is missing.

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 coverage is 100%, so both parameters (app, task) are already documented with defaults and length limits. The description implies Glofox is the default via its action list and hints that the app name drives which guide is returned, but adds no syntax or formatting detail beyond the schema. 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 names a specific resource (a per-app operating guide: browser choice, sign-in link, step-by-step method, screens, menus, actions, notes, dedicated tools) rather than restating the name. It is distinguishable from the browser_* siblings because it returns knowledge rather than performing UI actions, though the opening sentence is a long enumerated list that blurs the core purpose slightly.

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?

Gives an explicit trigger: "Call it before the first browser step in an app," plus a fallback rule that apps outside the catalog get the general method. It also scopes the Glofox-specific coverage to five named actions. It does not name a sibling alternative (e.g., cotlet_apps) for catalog lookup, but the when-to-use condition is unambiguous.

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