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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered. The description adds real value on top by stating explicitly that it 'opens nothing by itself' and only returns a step-by-step sequence of screens, buttons and fields. The trailing note about Amazing Marvin's REST API and lack of an official MCP server is irrelevant to how the agent should behave.

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 two clauses are front-loaded and efficient: what it returns, and that it opens nothing. But the closing sentence about the official API and the 'checked 6 Nov 2026' date is filler that does not help an agent decide or act, and 'from ChatGPT, Claude or any AI agent' adds no selection value.

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 inputs and no output schema, the description does a fair job explaining that the return is a procedural guide and that execution happens through browser tools. What remains unclear is whether the guidance is generic or tied to a specific task, and how granular the returned steps are — meaningful gaps for a zero-parameter guidance 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?

Zero parameters, so the baseline is 4 and there is no parameter meaning for the description to carry. The one semantic question this raises — how a task is identified if no input is accepted — is left unaddressed, which is the only thing holding it below a 5.

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 gives a specific verb and resource (reschedule task) and, crucially, clarifies that the tool does not perform the action itself but returns step-by-step instructions for the user's own Amazing Marvin account. That reframing distinguishes it from an executor, though the title alone would mislead. It falls short of a 5 because the relationship to siblings like amazing_marvin_create_task or a direct API path is never spelled out.

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 states the follow-up clearly: get the guide here, then act with the cotlet_browser_* tools in the Cloud Browser. That is useful workflow context. However it never says when to prefer this over the other amazing_marvin_* tools or what to do when a direct route exists, so usage is implied rather than bounded.

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