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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds that output is throwaway filler for mockups, which is modest context, but says nothing about determinism, uniqueness, or return shape.

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?

A single sentence, front-loaded with the verb and resource, and the trailing 'as filler for mockups and layouts' earns its place by scoping intent. No filler text of its own.

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 output schema and all three optional parameters documented in the schema, the description covers enough for correct invocation. It stops short of clarifying the return shape (e.g. whether output is one block or multiple units), which would be the only real gap.

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 count, flavor and format are fully documented in the schema including defaults. The description only restates the flavor list already present as an enum, adding no new semantics beyond the baseline.

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 specific verb (Generate) and resource (rizz-flavored placeholder text), and enumerates the four supported dialects, so the tool's function is unambiguous. It does not, however, distinguish itself from the sibling rizzipsum.open, leaving overlap unresolved.

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?

'As filler for mockups and layouts' implies the intended scenario, which is real guidance. But there is no explicit when-to-use versus when-not, and the sibling rizzipsum.open is never mentioned as an alternative.

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