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

Adds real context beyond the annotations: it is free, opens no browser session, and degrades to a general method for uncatalogued apps. With readOnlyHint/idempotentHint already declaring the safety profile, these are useful but not critical additions, and it says nothing about output shape, latency, or what happens if called mid-flow.

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?

Purpose and the call trigger are front-loaded in the opening clauses, and every sentence carries information. However, the middle is a dense run-on enumeration of returned content, and the final PatientNow action list is somewhat tacked on.

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?

No output schema exists, and the description compensates by listing what the returned guidance contains and by scoping its coverage (any web app, catalog vs. general method). For a zero-required-parameter read tool this is close to complete; only the response format and any size limits are unstated.

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 'app' and 'task' are already documented, including the PatientNow default. The description only reinforces this by naming the covered PatientNow actions, which hints at valid app identifiers but adds no syntax or format guidance beyond the schema.

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: retrieves how-to guidance for operating a given app through Cotlet's Cloud Browser, and enumerates the returned content (browser choice, sign-in link, step-by-step method, screens/menus/actions, notes, dedicated tools). It is clearly distinguished from the cotlet_browser_* primitives it feeds and from the patientnow_* action tools it points to.

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') and a coverage rule ('Works for any web app; one outside Cotlet's catalog gets the general method'). It does not state when to skip it or name a specific alternative to use instead, which keeps it short of a 5.

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