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

Annotations already declare readOnlyHint=true, destructiveHint=false, idempotentHint=true and openWorldHint=false, so the safety profile is covered. The description usefully adds 'opens nothing by itself' and that the output is human-readable step-by-step UI guidance, plus the note that Inoreader has no official MCP server — meaningful context beyond the annotations, though it doesn't describe the shape or variability of the returned steps.

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 key clarification ('opens nothing by itself') is buried in the middle of the second sentence instead of being front-loaded, and the leading 'Create rule' phrasing works against it. The final sentence about Inoreader's REST API/OAuth and the dated check is background context that does not help an agent invoke this tool.

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, non-destructive guidance tool with no output schema, the description covers what is returned (step-by-step screens, buttons, fields), what is not done (nothing is opened), and how to complete the task via the browser tools. It is essentially complete, with only minor gaps around how the returned guidance is formatted.

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 tool takes zero parameters, so the baseline is 4 and there is nothing for the description to disambiguate. It correctly implies no inputs are needed to obtain the guidance.

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 eventually makes clear that this tool returns step-by-step instructions (screens, buttons, fields) for creating an Inoreader rule rather than creating it, which distinguishes it from the browser tools that actually perform the action. However, the opening clause 'Create rule in the user's own Inoreader account from ChatGPT, Claude or any AI agent' reads as if the tool itself creates the rule, so the real purpose only becomes unambiguous in the second sentence.

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 explicitly routes the agent: get the steps here, then execute them with the cotlet_browser_* tools in the user's Inoreader Cloud Browser, which is a clear when-to-use instruction and names the follow-on alternatives. It does not state exclusions (e.g., when not to use it versus the other inoreader_* tools), but the intended workflow is unambiguous.

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