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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the 'opens nothing by itself' line mostly reinforces what is structurally known. The added value is the disclosure of the return content — step-by-step screens, buttons, and fields — which tells the agent this is an instruction-producing tool, not an executor. Beyond that it says nothing about output shape, freshness of the Thumbtack UI instructions, or failure modes.

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?

Two core sentences are front-loaded: what it returns, that it opens nothing, and what to do next. The clause 'from ChatGPT, Claude or any AI agent' is filler, and the closing sentence about the official Partner API is tangential but does justify the browser-based workflow, so it earns a partial place.

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, read-only, non-open-world tool with no output schema, the description supplies what matters: that the output is procedural guidance and that execution happens via cotlet_browser_* tools. It is close to complete; only the expected structure of the returned steps is left unspecified.

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 with full schema coverage, so there is nothing for the description to disambiguate. Baseline 4 applies; no parameter description is needed or missing.

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 makes clear the tool does not send anything itself: it 'Returns how to do it in Thumbtack step by step (screens, buttons, fields)' and 'opens nothing by itself.' That resolves the tension with the tool name, which on its own would suggest a write action. It could have stated the core purpose in the opening clause rather than after the account/brand framing.

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 to the follow-on action: 'then do it with the cotlet_browser_* tools in the user's Thumbtack Cloud Browser.' The note about the gated official Partner API explains why a browser path is required instead of an API call, which is genuine decision context. There is no explicit statement of when not to use it or which specific browser tool comes first.

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