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

Annotations already declare readOnlyHint=false, idempotentHint=false, openWorldHint=true, and destructiveHint=false. The description adds one genuinely useful trait — that meaning is preserved during the rewrite — but does not clarify whether the stored content is replaced or new text is returned, which matters given the non-read-only hint.

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?

Very short and front-loaded, with the substantive clause first. The redundant 'Adjust tone' line duplicates the tool name and title and could be dropped without loss.

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 non-read-only transformation over user content with no output schema, the description should state what happens to the original copy and what the caller receives back. Neither is addressed, and two of three parameters remain unexplained.

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 coverage is only 33%: targetTone has an example list, but content and contentGroupId are entirely undocumented in both schema and description. The description does not compensate, saying nothing about what targetTone accepts or what contentGroupId does.

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 second sentence gives a specific verb and resource: rewriting existing copy into a different tone while preserving meaning. However, it never distinguishes itself from text-editing siblings such as makeConcise, proofread, or customEdit, and the leading line 'Adjust tone' simply restates the tool name.

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?

No guidance on when to pick this over makeConcise, proofread, or customEdit, all of which operate on the same copy and could plausibly be confused with it. The only implied usage is 'you want a different tone', which is just the name restated.

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