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

Annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false; the description reinforces this with the non-obvious fact that nothing is opened and the return value is a procedure. It adds real value beyond the annotations by pre-empting the wrong mental model of a write. It omits any note on whether the user must be signed in to the Mews Cloud Browser first.

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 two sentences are front-loaded and load-bearing. The final sentence about Mews's Connector API and the absence of an official MCP server, plus the "from ChatGPT, Claude or any AI agent" clause, is background that does not help an agent decide or call correctly.

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 tool, the description supplies what matters: it is read-only, returns a UI walkthrough, and hands off to the browser tools. Missing are the prerequisites for the handoff, such as an open Mews Cloud Browser session, and any indication of what the returned steps look like in shape or length.

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 there is no schema semantics to supplement and the baseline is 4. The description correctly implies no input is needed, but it also does not say how the target task details are conveyed, which is the one input question an agent will have.

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 concrete verb and resource ("Create task in the user's own Mews account") and immediately disambiguates the actual behavior: it returns step-by-step Mews UI instructions rather than performing the action. That distinction from the cotlet_browser_* siblings is the single most useful thing an agent needs, though the opening phrase still reads like a mutation until the second sentence corrects it.

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 explicit routing: call this to learn the screens/buttons/fields, then execute with cotlet_browser_* in the Mews Cloud Browser. It also rules out an implicit expectation ("opens nothing by itself"). It stops short of stating when not to use it, e.g. for tasks already documented elsewhere or when a direct Mews API sibling suffices.

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