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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered; the description adds non-obvious behavior it could not get elsewhere: each link embeds the entire compressed wireframe, so anyone holding a link can read the content. That is a meaningful disclosure about self-contained, unauthenticated output. It stops short of describing link length limits or expiry, which the 'each link is long' remark only hints at.

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?

Three sentences, front-loaded with what the tool produces, then caller guidance, then the key privacy note. The lead-in clause with its playground-menu analogy is a bit loose but earns its place by pointing at a known reference; nothing is redundant.

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 read-only three-parameter tool with full schema coverage and no output schema, the definition covers purpose, output kinds, defaults, and the data-embedded-in-link property an agent must know before generating links for a user. Only sibling routing is unaddressed.

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?

Schema description coverage is 100%, so text, flows, and links are already fully documented, including the enum meanings and the [svg, share] default. The description restates the default and adds the 'ask only for what the user needs' phrasing, but contributes no format or syntax detail beyond the schema, making baseline 3 correct.

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 states the resource (tsquare wireframe text) and enumerates exactly what is produced: a playground edit share link, SVG/PNG image links, Markdown and HTML. The opening phrase "Links for valid tsquare wireframe text" is slightly garbled rather than a clean verb+object, and it never names the sibling render_wireframe to distinguish 'get links' from 'render'.

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 gives concrete caller guidance ("Ask only for the links the user needs") plus a stated default of SVG + share, and the schema's links enum explains when each format is appropriate (Notion/GitHub, READMEs, web pages). It does not say when to prefer this over render_wireframe, so routing between siblings is left to inference.

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