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

Annotations already declare readOnlyHint and idempotentHint with no destruction, so the safety bar is low; the description still adds real value by stating 'opens nothing by itself' and specifying the return content (screens, buttons, fields). It does not describe whether the guidance is account-specific or generic, which is the main remaining behavioral unknown.

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 core behavior is front-loaded in the second sentence, but the opening 'from ChatGPT, Claude or any AI agent' is filler that doesn't guide invocation. The trailing API/OAuth note with a checked-on date is tangential to using the tool, though it does justify why browser automation is the only path.

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 zero-parameter, no-output-schema guidance tool with annotations covering safety, this is close to complete: it says what comes back and what to do next. A short note on whether a Cloud Browser session must already be open would close the last gap.

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 schema takes zero parameters with full coverage, so the baseline is 4. The description implicitly explains why there are no arguments – it returns generic instructions rather than querying – which is helpful, though it never explicitly says 'call with no arguments'.

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 verb and resource ('Search articles in the user's own Inoreader account') and then discloses that it returns step-by-step instructions rather than performing the search. That second sentence is what keeps this from being misleading given the imperative-sounding name, but the opening clause still reads like a search action, so an agent must read to the end to learn the tool is a how-to guide.

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?

It gives clear sequencing guidance: call this to get the screens/buttons/fields, then carry out the search with the cotlet_browser_* tools in the user's Inoreader Cloud Browser. It states no exclusions or prerequisites (e.g., browser session must be open, account must be connected), 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.