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

Genuinely useful disclosure that it "opens nothing by itself" and returns instructions, which reconciles the mutating name with readOnlyHint/idempotentHint=true and prevents an agent mistaking it for a write. However, with zero input parameters it never explains how the task content is conveyed to the tool, which is the single most important behavioral unknown here. The closing sentence about the official REST API and "no official MCP server (checked 6 Nov 2026)" is unrelated to the tool's behavior.

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 first sentence front-loads the non-obvious scope ('user's own account', 'from ChatGPT, Claude or any AI agent') and the second carries the actionable routing. The final API-availability sentence does not earn its place and dilutes the otherwise tight two-sentence core.

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-param, no-output-schema tool the description covers what comes back (step-by-step screens/buttons/fields) and the handoff to browser tools. It is incomplete on the central question of how a task with no parameters gets specified, and the irrelevant API aside distracts rather than completes the picture.

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 schema-baseline is 4 and there is nothing for the description to document. Still, the fact that a 'create task' tool accepts no task data is unexplained and would benefit from a clause about where the task details come from.

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 does say what comes back ("how to do it in Amazing Marvin step by step (screens, buttons, fields)"), but the name and title promise a creation action while the text reveals it is a guidance/instructions tool, so the agent must read to the end to learn the tool does not create anything. It also does not distinguish this from siblings like amazing_marvin_create_project. Purpose is inferable but muddled rather than stated with a crisp verb+resource.

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 follow-up work: "then do it with the cotlet_browser_* tools in the user's Amazing Marvin Cloud Browser", which is a clear alternative path an agent can act on. What's missing is when NOT to use it, e.g. whether reading tasks should go through the amazing_marvin_list_* siblings instead.

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